Astronomical Calendar - A.D. 2017

Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.


Authored By Glenn A. Walsh *** Sponsored By Friends of the Zeiss
Electronic Mail: < astrocalendar@planetarium.cc > *** Internet Web Cover Page: < http://www.planetarium.cc >
This Internet Web Page: < http://buhlplanetarium4.tripod.com/astrocalendar/2017.html >
SpaceWatchtower Blog
2017 January

Internet Web Site Master Index for the History of
The Buhl Planetarium and Institute of Popular Science, Pittsburgh

SpaceWatchtower Blog


ASTRONOMICAL / CALENDAR EVENTS --

A.D. 2017

January ** February ** March

April ** May ** June

July ** August ** September

October ** November ** December


2017

Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days

Chronological Cycles and Eras

Astro Calendar
Current Month

Astro Calendar
Archives


Constellations
For Year

Star Charts
For Year

Moon Phases:
Archive * 2017 * Today

Next 27.32166 Days (Orbital Period)
(Scroll to bottom of page)

Planets, Stars, Sky Events:
Today *** This Week

Solar System *** Archive

Occultations:

Archive * 2017

10,000-Year
Calendar

Astronomy Links

Science Links

Astronomical Glossary
Click here for links to the Moon, planets, star clusters, stars, and other astronomical terms referred to in this Astronomical Calendar.

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days - Archive

(Actual Dates and Times - Source: Eric G. Canali, former Floor Manager of Pittsburgh's original Buhl Planetarium and Institute of Popular Science and Founder of the South Hills Backyard Astronomers amateur astronomy club)

* Mon., Feb. 2 - Traditional Astronomical Cross-Quarter Day Imbolc, and also Candlemas, better known as Groundhog Day. (First traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Winter season: Feb. 1 Eve - Feb. 2).
(Groundhog Day at Gobler's Knob, Punxsutawney PA 15767, home of Punxsutawney Phil: - Sunrise: 7:26 a.m. EST / 12:26 UTC) .
Actual Cross-Quarter Day.

* Fri., Feb. 3, 5:36 p.m. EST / 22:36 UTC - Actual Astronomical Cross-Quarter Day (First actual Astronomical Cross-Quarter Day of year; mid-way point in Winter season: ~Feb. 4).
Traditional Cross-Quarter Day.

* Mon., March 20, 6:29 a.m. EDT / 10:29 UTC - Vernal Equinox - Season of Spring begins in Earth's Northern Hemisphere: beginning of New Year (solar calendar) in Afghanistan and Iran. (~March 20)

* Fri., May 1 - Traditional Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Spring season (May 1).
Actual Cross-Quarter Day.

* Fri., May 5, 3:26 p.m. EDT / 19:26 UTC - Actual Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; mid-way point in Spring season (~May 5-6).
Traditional Cross-Quarter Day.

* Wed., June 21, 12:24 a.m. EDT / 4:24 UTC - Summer Solstice - Season of Summer begins in Earth's Northern Hemisphere (~June 21).
Also see 1985-1991: Summer "Solstice Day," Annual Free Day at Buhl Planetarium.

* Sat., Aug. 1 - Astronomical Mid-Point of Summer - Traditional Astronomical Cross-Quarter Day, also known as “Lammas” (in the United Kingdom) and “Lughnassad” (in Ireland). Considered approximate date of First Harvest (third traditional cross-quarter day of the year), approximately between the Midsummer Solstice and the Autumnal Equinox (July 31 Eve - Aug. 1).
Actual Cross-Quarter Day.

* Sun., Aug. 6, 8:13 p.m. EDT / Aug. 7, 0:13 UTC - Astronomical Mid-Point of Summer - Actual Astronomical Cross-Quarter Day (halfway between the June Solstice and September Equinox: ~Aug. 6 to 7).
Traditional Cross-Quarter Day.

* Fri., Sept. 22 - Falls Prevention Awareness Day (First day of Fall: ~Sept. 22-23).

* Fri., Sept. 22, 4:02 p.m. EDT / 20:02 UTC - Autumnal Equinox - Season of Autumn begins in Earth's Northern Hemisphere. (~Sept. 22)
Also see: Harvest Moon.

* Sat., Oct. 31 / Sun., Nov. 1 / Mon., Nov. 2 - Traditional Astronomical Cross-Quarter Day Samhain or "All-Hallowsmas", better known as Halloween (Oct. 31 - "All Hallows Eve"), All-Saints Day (Nov. 1), All-Souls Day (Nov. 2) (fourth and last traditional cross-quarter day of year).

What is a "Cross-Quarter Day" ?
What is the Astronomical significance of
Halloween, All-Saints Day, and All-Souls Day?
Link 1 *** Link 2 *** Link 3 *** Link 4
Actual Cross-Quarter Day.

* Mon., Nov. 6, 1:15 p.m. EST / 17:15 UTC - Actual Astronomical Cross-Quarter Day (fourth and last actual cross-quarter day of the year: ~Nov. 6-7).
Traditional Cross-Quarter Day.

* Thur., Dec. 21 - Homeless Persons' Memorial Day. (First day of Winter; longest night of the year: ~Dec. 21)

* Thur., Dec. 21, 11:28 a.m. EST / 16:28 UTC - Winter Solstice - Season of Winter begins in Earth's Northern Hemisphere. (~Dec. 21-22)
Also see: "The Stars of Winter" and "The Star of Bethlehem" Planetarium Sky Dramas (web sites include entire planetarium show scripts), performed each Winter in the Theater of the Stars of Pittsburgh's original Buhl Planetarium and Institute of Popular Science.

Chronological Cycles and Eras Corresponding to Anno Domini (A.D.) 2017 or 2017 Common Era (C.E.) - Archive

Unless otherwise indicated, all dates are given in terms of the Gregorian Calendar.
For recent years, January 14 of the Gregorian Calendar corresponds to January 1 of the Julian Calendar.

Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.
Epact: 2.
Golden Number (Lunar Cycle): IV.
Julian Period (Year of): 6730.
Roman Indiction: 10.
Solar Cycle (28-year cycle of the Julian calendar): 10.

Byzantine Year 7526 Begins Sept. 14.
Jewish Year (A.M.) 5778 Begins at Sunset, Sept. 20.
Chinese Year of the Rooster 4715 Begins Jan. 28.
Roman A.U.C. (Dates from the founding of the City of Rome) Year 2770 Begins Jan. 14.
Nabonassar Year 2766 Begins April 23.
Japanese (Heisei) Year 2677 - Period or Era 29 Begins January 1.
Grecian Year (Selucidae) 2329 Begins Sept. 14 (or Oct. 14).
Indian Year (Saka) 1939 Begins March 22.
Diocletian Era (Era of the Martyrs) Year 1734 Begins Sept. 11.
Islamic (Hegira) Year 1439 Begins at first viewing of lunar crescent (New Moon) on evening of Sept. 20.

NEWS: Astronomy, Space, Science

History of Buhl Planetarium and Institute of Popular Science, Pittsburgh


A.D. 2017

Astronomical Calendar: 2017 January
Monthly Observances This Month

* Quadrantid Meteor Shower: Jan. 3 to 4

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* Sat., 2016 Dec. 31 - Make Up Your Mind Day. (Dec. 31)

* Sat., 2016 Dec. 31 - Eve of New Year's Day (Traditional). (Dec. 31)

* Sat., 2016 Dec. 31, 6:59:60 p.m. EST / 23:59:60 UTC - Positive 'Leap Second' added to the civil time scale, to help keep clocks synchronized with the slowing rotation rate of the Earth. (Periodically: last additional second of last minute of June 30 and / or December 31)

* Sat., 2016 Dec. 31, 7:00:00 p.m. EST / 2017 Jan. 1, 00:00:00 UTC - Marks the beginning of the New Year by the Coordinated Universal Time scale, the time scale used by many scientists. (Dec. 31)

* Sun., Jan. 1 - Feast of the Circumcision of Christ - Eighth day of the 12 days of Christmas: Dec. 25 to Jan. 5. During the Gregorian Calendar reform, Pope Gregory XIII, chose the Feast of the Circumcision of Christ as the beginning of the New Year in the Roman Catholic Church's Liturgical Year; previously, the Feast of the Annunciation on March 25 (also the Vernal Equinox in the "original" Julian Calendar adopted by the second king of Rome, Numa Pompilius, in the 7th century B.C.) had been considered the beginning of the New Year. (Jan. 1)

* Sun., Jan. 1 - Last day of Kwanzaa - Week-long holiday observance honoring African-American heritage. (Dec. 26 to Jan. 1)

* Sun., Jan. 1 (1863) - Anniversary: Emancipation Proclamation issued by U.S. President Abraham Lincoln during the American Civil War, which decreed that slaves in the rebellious states are free forever. (Jan. 1)

* Sun., Jan. 1 - First Day Hikes in America’s State Parks. (Jan. 1)

* Sun., Jan. 1, 12:00:00 Midnight (00:00:00) Prevailing Local Time - For Eastern Standard Time (EST) Zone in North America: 12:00:00 Midnight EST / 5:00:00 Coordinated Universal Time (UTC) which correlates with 12:00:00 Midnight EST - New Year's Day: New Calendar Year begins. (Jan. 1)

* Sun., Jan. 1, 2:00 a.m. EST / 7:00 UTC - Mars 0.02 degree south of Neptune.

* Mon., Jan. 2 - New Year's Day - Observed (Federal Holiday observed on Monday, as New Year's Day falls on Sunday). (Jan. 2)

* Mon., Jan. 2, 4:00 a.m. EST / 9:00 UTC - Venus 1.9 degrees south of the Moon.

* Mon., Jan. 2, 11:00 p.m. EST / Jan. 3, 4:00 UTC - Neptune 0.4 degree south of the Moon; occultation: majority of Southeast Asia, Micronesia, Hawaii, West Coast of North America.

* Tue., Jan. 3, 2:00 a.m. EST / 7:00 UTC - Mars 0.2 degree south of the Moon; occultation: southern tip of India, majority of Southeast Asia, Micronesia.

* Tue., Jan. 3, 10:00 a.m. EST / 15:00 UTC - (Best viewing: Midnight to Dawn) - Peak of Quadrantid Meteor Shower. (Jan. 3 to 4)

* Wed., Jan. 4, 9:00 a.m. EST / 14:00 UTC - Earth at perihelion (closest Earth approach to the Sun in New Year): 91,404,322.506562 miles / 147,100,998 kilometers. (Jan. 2 to 4)

* Wed., Jan. 4, 10:56 a.m. EST / 15:56 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Thur., Jan. 5 - National Bird Day. (Jan. 5)

* Thur., Jan. 5, 2:47 p.m. EST / 19:47 UTC - Moon Phase: First Quarter.

* Thur., Jan. 5, Evening - "12th Night" of Christmas; end of the 12 days of Christmas, which began on Christmas Day. (Jan. 5)

* Fri., Jan. 6 - Feast of the Epiphany; the day after the "12th Night" of Christmas. Tradition celebrates Epiphany as day the Magi arrived in Bethlehem to present gifts to the Christ child. (Jan. 6)

* Sat., Jan. 7 - Orthodox Christmas - As determined by Julian Calendar. (Jan. 7)

* Jan. 8 to 14 - Winter Driving Awareness Week.

* Sun., Jan. 8 (1851), 2:00 a.m. Paris Time - Earth's Rotation Day - Anniversary: French physicist Jean Leon Foucault develops a simple device to finally demonstrate and prove that the Earth rotates on its axis: Foucault Pendulum. He demonstrated the Foucault Pendulum, before scientists at the Paris Observatory, on 1851 February 3.
Near the end of his life, Jean Leon Foucault also developed the Siderostat-type Refractor Telescope. (Jan. 8)

* Mon., Jan. 9 - National Clean Off Your Desk Day. (2nd Monday of January)

* Mon., Jan. 9 (1793) - First balloon flight in America. (Jan. 9)

* Mon., Jan. 9, 10:00 a.m. EST / 15:00 UTC - Star Aldebaran 0.4 degree south of the Moon; occultation: northeastern portion of Africa, Middle East, India, China, Japan.

* Tue., Jan. 10 (1920) - Founding of the League of Nations. (Jan. 10)

* Tue., Jan. 10, 1:00 a.m. EST / 6:00 UTC - Moon at perigee: 225,705.6291 miles / 363,238 kilometers.

* Wed., Jan. 11 - National Human Trafficking Awareness Day. (Jan. 11)

* Wed., Jan. 11, 1:58 p.m. EST / 18:58 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Thur., Jan. 12, 6:34 a.m. EST / 11:34 UTC - Moon Phase: Full Moon (Wolf Moon).

* Thur., Jan. 12, 8:00 p.m. EST / Jan. 13, 1:00 UTC - Venus 0.4 degree north of Neptune.

* Fri., Jan. 13 - "Friday the 13th" superstition; debunking this superstition, purpose of character King Friday the 13th on popular PBS children's television series, Mister Rogers' Neighborhood (originated at WQED-TV channel 13 in Pittsburgh). (Friday the 13th)

* Fri., Jan. 13 - New Year's Eve, according to the Julian Calendar. (Jan. 13)

* Sat., Jan. 14 - Beginning of the New Year, according to the Julian Calendar. (Jan. 14)

* Sun., Jan. 15 (1929) - Anniversary of the Birthday of Martin Luther King, Jr. (Observed - USA: Third Monday in January): Birth of Rev. Dr. Martin Luther King, Jr.. (Jan. 15)

* Sun., Jan. 15 (2001) - Anniversary of launch of Wikipedia, free-of-charge, on-line encyclopedia. (Jan. 15)

* Sun., Jan. 15, 12:00 Midnight EST / 5:00 UTC - Star Regulus 0.8 degree north of the Moon; occultation: southern half of South America, Antarctic Peninsula.

* Mon., Jan. 16 - Martin Luther King, Jr. Day (Observed - USA: Third Monday in January): Birth of Rev. Dr. Martin Luther King, Jr.: 1929 Jan. 15. (Third Monday in January)

* Tue., Jan. 17 - Kid Inventors’ Day (K.I.D.), on January 17 in honor of the birth of famous inventor Benjamin Franklin, who invented the first swim flippers at the age of 12. (Jan. 17)

* Tue., Jan. 17, 8:00 p.m. EST / Jan. 18, 1:00 UTC - Asteroid Vesta at opposition (Vesta visible approx. local sunset to local sunrise).

* Jan. 19 to 28 - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Thur., Jan. 19, 12:00 Midnight EST / 5:00 UTC - Jupiter 3 degrees south of the Moon.

* Thur., Jan. 19, 5:13 p.m. EST / 22:13 UTC - Moon Phase: Last Quarter.

* Sat., Jan. 21 - Squirrel Appreciation Day. (Jan. 21)

* Sat., Jan. 21, 7:00 p.m. EST / Jan. 22, 0:00 UTC - Moon at apogee: 251,601.8949 miles / 404,914 kilometers.

* Jan. 23 to 29 - National Drug & Alcohol Facts Week. (4th week of January)

* Tue., Jan. 24 - National Compliment Day. (Jan. 24)

* Tue., Jan. 24, 5:00 a.m. EST / 10:00 UTC - Saturn 4 degrees south of the Moon.

* Wed., Jan. 25 (1915) - First transcontinental telephone call. (Jan. 25)

* Wed., Jan. 25, 8:00 p.m. EST / Jan. 26, 1:00 UTC - Mercury 4 degrees south of the Moon.

* Thur., Jan. 26 - Australia Day, commemorating the first landing in Australia by Captain Arthur Phillip. (Jan. 26)

* Fri., Jan. 27 - Holocaust Remembrance Day (UN). (Jan. 27)

* Fri., Jan. 27 (1967) - 50th Anniversary of Apollo 1 fire; three astronauts perished: Gus Grissom, Ed White, Roger Chaffee. (Jan. 27)

* Fri., Jan. 27 (1926) - First public demonstration, in London, of a black-and-white, mechanical television system. (Jan. 27)

* Fri., Jan. 27, 7:07 p.m. EST / Jan. 28, 0:07 UTC - Moon Phase: New Moon - Lunation # 1164.

* Sat., Jan. 28 (1986) - Anniversary of STS Space Shuttle Challenger explosion; seven astronauts perished: Francis Scobee, Michael Smith, Elison Onizuka, Judith Resnik, Ronald McNair, Gregory Jarvis, Christa McAuliffe (Teacher-in-Space). (Jan. 28)
Viewed at Pittsburgh's original Buhl Planetarium and Institute of Popular Science (a.k.a. Buhl Science Center).

* Sat., Jan. 28 - Chinese New Year, based on a lunisolar calendar of which dates indicate both the moon phase and the time of the solar year. This marks the beginning of the Chinese Year of the Rooster.

* Sat., Jan. 28 - Data Privacy Day. (Jan. 28)

* Jan. 29 to Feb. 4 - National Catholic Schools Week. (End of January / Beginning of February)

* Sun., Jan. 29 - Earned Income Tax Credit (EITC) Awareness Day. (Jan. 29)

* Mon., Jan. 30 - National Bubble-Wrap Appreciation Day, first used by IBM to safely ship computers in 1961. (Last Monday of January)

* Mon., Jan. 30, 6:00 a.m. EST / 11:00 UTC - Neptune 0.2 degree south of the Moon; occultation: South Atlantic Ocean including Ascension Island, central portion of Africa, Saudi Arabia, India, western portion of China.

* Tue., Jan. 31 (1958) - Anniversary of the first successful launch, by the USA, of an artificial satellite: Explorer 1. (Jan. 31)

* Tue., Jan. 31, 10:00 a.m. EST / 15:00 UTC - Venus 4 degrees north of the Moon.

* Tue., Jan. 31, 8:00 p.m. EST / Feb. 1, 1:00 UTC - Mars 2 degrees north of the Moon.

Astronomical Calendar: 2017 February
Monthly Observances This Month

Eclipses in 2017 February ---
Penumbral Lunar Eclipse: Feb. 10 to 11
Annular Solar Eclipse: Feb. 26

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* Jan. 29 to Feb. 4 - National Catholic Schools Week. (End of January / Beginning of February)

* Tue., Jan. 31, 8:00 p.m. EST / Feb. 1, 1:00 UTC - Mars 2 degrees north of the Moon.

* Wed., Feb. 1 (2003) - Anniversary of STS Space Shuttle Columbia disintegration during re-entry; seven astronauts perished: Rick Husband, William McCool, David Brown, Kalpana Chawla, Michael Anderson, Laurel Clark, Ilan Ramon. (Feb. 1)

* Wed., Feb. 1 (1865) - National Freedom Day -Date in 1865 when U.S. President Abraham Lincoln signed a resolution proposing the Thirteenth Amendment to the United States Constitution prohibiting slavery. (Feb. 1)

* Wed., Feb. 1 - National Change Your Password Day!. (Feb. 1)

* Wed., Feb. 1, 8:08 a.m. EST / 13:08 UTC - Jupiter near bright Star Spica.

* Thur., Feb. 2 - Traditional Astronomical Cross-Quarter Day Imbolc, and also Candlemas, better known as Groundhog Day. (First traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Winter season: Feb. 1 Eve - Feb. 2).
(Groundhog Day at Gobler's Knob, Punxsutawney PA 15767, home of Punxsutawney Phil: - Sunrise: 7:25 a.m. EST / 12:25 UTC) .
Actual Cross-Quarter Day.

* Thur., Feb. 2, 6:31 a.m. EST / 11:31 UTC - Mars near Venus.

* Thur., Feb. 2, 9:00 p.m. EST / Feb. 3, 2:00 UTC - Asteroid & Dwarf Planet Ceres 1.0 degree south of the Moon; occultation: Alaska, northern Canada, Greenland, eastern portion of Siberia in Russia.

* Fri., Feb. 3 (1851) - Anniversary: Jean Leon Foucault first demonstrates, before scientists in the Meridian Room of the Paris Observatory, the Foucault Pendulum, which is a proof that the Earth rotates on its axis. He had invented the device on 1851 January 8.
Near the end of his life, Jean Leon Foucault also developed the Siderostat-type Refractor Telescope. (Feb. 3)

* Fri., Feb. 3 - National Wear Red Day - Go Red for Women movement to heart disease in women (American Heart Association). (First Friday in Feb.)

* Fri., Feb. 3, 5:36 p.m. EST / 22:36 UTC - Actual Astronomical Cross-Quarter Day. (First actual Astronomical Cross-Quarter Day of year; mid-way point in Winter season: ~Feb. 4)
Traditional Cross-Quarter Day.

* Fri., Feb. 3, 11:19 p.m. EST / Feb. 4, 4:19 UTC - Moon Phase: First Quarter.

* Sat., Feb. 4 - World Cancer Day (WCD). (Feb. 4)

* Sat., Feb. 4 - Thank A Mailman Day. (Feb. 4)

* Sat., Feb. 4 - Lichun - Beginning of first Solar term (of 24 Solar terms in one year) of traditional East Asia calendars (begins when the Sun reaches the celestial longitude of 315° and ends when it reaches the longitude of 330°); also known as the start of Spring (Occurs each year around Feb. 4)

* Sun., Feb. 5 - National Weatherperson's Day - Birth of one of America's first weather observers, John Jeffries (picture): 1744 February 5. (Feb. 5)

* Sun., Feb. 5, 5:00 p.m. EST / 22:00 UTC - Star Aldebaran 0.2 degree south of the Moon; occultation: Central America, northern portion of South America, Caribbean Sea, southern portion of Europe, northern portion of Africa, western portion of the Middle East.

* Mon., Feb. 6, 9:00 a.m. EST / 14:00 UTC - Moon at perigee: 229,171.6376 miles / 368,816 kilometers.

* Tue., Feb. 7 - African American Coaches Day about the benefits of working with a personal or business coach. (First Tuesday in February)

* Tue., Feb. 7 - Mercury at aphelion.

* Wed., Feb. 8 (1910) - Anniversary of founding of the Boy Scouts of America. (Feb. 8)

* Thur., Feb. 9, 5:59 p.m. EST / 22:59 UTC - Praesepe (M44): The Beehive Cluster near the nearly-Full Moon.

* Fri., Feb. 10, 7:33 p.m. EST / Feb. 11, 0:33 UTC - Moon Phase: Full Moon (Snow Moon).

* Fri., Feb. 10, 7:43:52.9 p.m. EST / Feb. 11, 0:43:52.9 UTC - Time of greatest eclipse for Penumbral Lunar Eclipse, dimly visible through most of the world except extreme western Alaska, extreme eastern Asia, Australia, New Zealand and most of the Pacific Ocean.

* Sat., Feb. 11 (1732) - Anniversary of birth of first American President, George Washington, according to Julian Calendar (also known as "Old Style Calendar"), at use at that time; according to Gregorian Calendar, which we use today, George Washington's birthday occurred on Feb. 22. (Feb. 11)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Sat., Feb. 11 - National Inventors' Day, anniversary of the birth of the inventor Thomas Alva Edison. (Feb. 11)

* Sat., Feb. 11, 9:00 a.m. EST / 14:00 UTC - Star Regulus 0.8 degree north of the Moon; occultation: Australia, New Zealand, Wilkes Land section of Antarctica.

* Sun., Feb. 12 (1809) - Anniversary of birth of 16th American President, Abraham Lincoln. (Feb. 12)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Sun., Feb. 12 (1809) - Anniversary of birth of English naturalist, Charles Darwin; Darwin Day. (Feb. 12)

* Sun., Feb. 12 - Autism Sunday / International Day of Prayer for Autism and Asperger Syndrome. (Second Sunday of February)

* Mon., Feb. 13 - World Radio Day (WRD).

* Mon., Feb. 13 - National Clean Out Your Computer Day. (Second Monday in February)

* Mon., Feb. 13 - Zodiacal Light visible, with difficulty after evening twilight (visible for up to an hour after dusk) in the western sky of the Northern Hemisphere, for the next two weeks. (February, March)

* Tue., Feb. 14 - St. Valentine's Day. (Feb. 14)

* Tue., Feb. 14 - Library Lovers Day. (Feb. 14)

* Tue., Feb. 14 - International Book Giving Day. (Feb. 14)

* Tue., Feb. 14 - National Have a Heart Day to promote awareness of our food choices so as to get or maintain a healthy heart. (Feb. 14)

* Tue., Feb. 14 - National Organ Donor Day. (Feb. 14)

* Wed., Feb. 15 (1564) - Anniversary of the birth of Italian Astronomer Galileo Galilei. (Feb. 15)

* Wed., Feb. 15 (1820) - Susan B. Anthony Day - Anniversary of the birth of Susan B. Anthony and commemoration of women's suffrage in the United States. (Feb. 15)

* Wed., Feb. 15, 10:00 a.m. EST / 15:00 UTC - Jupiter 3 degrees south of the Moon.

* Thur., Feb. 16 - World Read Aloud Day.

* Fri. through Mon., Feb. 17, 18, 19, 20 - CITIZEN SCIENCE: The Great Backyard Bird Count. (Presidents' Day holiday weekend, starting on Friday)

* Fri., Feb. 17 - Random Acts Of Kindness Day. (Feb. 17)

* Fri., Feb. 17, 3:02 a.m. EST / 8:02 UTC - Jupiter at aphelion.

* Fri., Feb. 17, 2:00 a.m. EST / 7:00 UTC - Venus brightest for the first half of 2017: Visual Magnitude -4.8.

* Feb. 18 to 27, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Sat., Feb. 18 (1930) - Anniversary date of discovery of Planet Pluto (now designated Dwarf Planet 134340 Pluto) discovered by Clyde Tombaugh working at Lowell Observatory in Flagstaff, Arizona. (Feb. 18)

* Sat., Feb. 18, 2:33 p.m. EST / 19:33 UTC - Moon Phase: Last Quarter.

* Sat., Feb. 18, 4:00 p.m. EST / 21:00 UTC - Moon at apogee: 251,267.5972 miles / 404,376 kilometers.

* Feb. 19 to 25 - National Engineers Week. (Third or fourth week in February, which includes George Washington's actual birthday of February 22)

* Sun., Feb. 19 (1473) - Anniversary of the birth of famous Polish astronomer Nicolaus Copernicus. (Feb. 19)
A portrait of Nicolaus Copernicus, donated to Pittsburgh's original Buhl Planetarium and Institute of Popular Science by the Polish Arts League of Pittsburgh, hung on the Mezzanine of Buhl Planetarium.
Also see photograph of the inscription of the name "Copernicus," just under the outer planetarium dome of Pittsburgh's original Buhl Planetarium and Institute of Popular Science.

* Feb. 20 to 24 - Fair Use / Fair Dealing Week, commissioned by the Association of Research Libraries. (Last full business week of February)

* Mon., Feb. 20 (1491) - Anniversary of the "Comet of 1491" which, until 2002, was considered the closest comet to ever approach the Earth. Today, this comet is not considered the closest comet to ever approach the Earth, due to the unreliability of data. (Feb. 20)
More information.

* Mon., Feb. 20 - Washington's Birthday Observed / Presidents' Day. (USA Federal Holiday: Third Monday in Feb.)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.
Also see: The Astronomy President.

* Mon., Feb. 20 - Venus at perihelion.

* Mon., Feb. 20, 6:53 p.m. EST / 23:53 UTC - Saturn 4 degrees south of the Moon.

* Tue., Feb. 21 - International Mother Language Day. (Feb. 21)

* Wed., Feb. 22 (1732) - Anniversary of birth of first American President, George Washington, according to Gregorian Calendar, which we use today; according to Julian Calendar (also known as "Old Style Calendar") at use at that time, George Washington's birthday occurred on Feb. 11. (Feb. 22)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Wed., Feb. 22, 2:56 p.m. EST / 19:56 UTC - Dwarf Planet Pluto very close to the Moon (visible with difficulty, when using a telescope).

* Thur., Feb. 23 - Introduce a Girl to Engineering Day. (Thursday of National Engineering Week)

* Thur., Feb. 23 - Digital Learning Day.

* Feb. 24, 25, 26 - National Girl Scout Cookie Weekend. (Last weekend of February / first weekend of March)

* Fri., Feb. 24 (1914) - Anniversary of the concept of the Projection Planetarium. (Feb. 24)

* Sat., Feb. 25 - Equilux when considering Civil Twilight (Dawn before sunrise and Dusk after sunset) - When considering Civil Twilight, the day when daylight and darkness, both, have the same length of hours and minutes. Occurs twice each year, approximately 23 days before the Vernal Equinox and 23 days after the Autumnal Equinox. (Feb. 25-26, Oct. 15)

* Feb. 26 to March 4 - Montessori Education Week. (Last week of February / first week of March)

* Sun., Feb. 26, 9:53:24.3 a.m. EST / 14:53:24.3 UTC - Time of greatest eclipse for Annular Solar Eclipse visible in a narrow path from the South Pacific Ocean through Chile, Argentina, South Atlantic Ocean, Angola, Zambia, and the Democratic Republic of the Congo. A Partial Solar Eclipse will be visible over a wider area of the eastern portion of the South Pacific Ocean, southern two-thirds of South America, South Atlantic Ocean, southern two-thirds of Africa, and a small portion of Antarctica.
NEVER look directly at a Solar Eclipse or Eclipse of the Sun unless you have the training and proper equipment to do so safely.
SAFE WAY TO VIEW SOLAR ECLIPSE OR ECLIPSE OF THE SUN

* Sun., Feb. 26, 9:58 a.m. EST / 14:58 UTC - Moon Phase: New Moon - Lunation # 1165.

* Feb. 27 to March 4 - America Saves Week. (Last week of Feb.)

* Feb. 27 to March 4 - Military Saves Week.

* Mon., Feb. 27 - International Polar Bear Day. (Feb. 27)

* Mon., Feb. 27, 3:00 a.m. EST / 8:00 UTC - Mars 0.6 degree north of Uranus.

* Mon., Feb. 27, 4:44 p.m. EST / 21:44 UTC - Mercury at farthest point from the Earth.

* Tue., Feb. 28 - World Spay Day. (Last Tuesday of every February)

* Tue., Feb. 28 - Shrove Tuesday / Fat Tuesday. (Day before Ash Wednesday)

* Tue., Feb. 28 - Rare Disease Day. (Last day of February: Feb. 28 or 29)

* Wed., March 1 (1504 Feb. 29 to March 1) - Anniversary of total lunar eclipse used by Christopher Columbus, to scare the natives of Jamaica into providing food and other provisions for his sailors. (Feb. 29 to March 1)
Also see first recorded lunar eclipse in continental North America.

Astronomical Calendar: 2017 March
Monthly Observances This Month

"March roars in like a lion and goes out like a lamb."
(Origin: Constellations Leo the Lion & Aries the Ram)

Daylight Saving Time Begins March 12

Spring Begins: ~ March 19, 20, 21

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* Feb. 26 to March 4 - Montessori Education Week. (Last week of February / first week of March)

* Feb. 27 to March 4 - America Saves Week. (Last week of Feb.)

* Feb. 27 to March 4 - Military Saves Week.

* Wed. March 1 (1504 Feb. 29 to March 1) - Anniversary of total lunar eclipse used by Christopher Columbus, to scare the natives of Jamaica into providing food and other provisions for his sailors. (Feb. 29 to March 1)
Also see first recorded lunar eclipse in continental North America.

* Wed., March 1 - Beginning of Meteorological Spring Season in Northern Hemisphere. (March 1)

* Wed., March 1 - Beginning of Autumn Season in Australia. (March 1)

* Wed., March 1 - St. David's Day. (March 1)

* Wed., March 1 - World Compliment Day. (March 1)

* Wed., March 1 - Ash Wednesday, the beginning of Lent. (First Wednesday in Lent, 46 days before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Wed., March 1, 2:00 p.m. EST / 19:00 UTC - Mars 4 degrees north of the Moon (closest approach: 4:21 p.m. EST / 21:21 UTC).

* Wed., March 1, 10:00 p.m. EST / March 2, 3:00 UTC - Neptune in conjunction with the Sun (Neptune not visible, even with a telescope).

* Thur., March 2 - Read Across America sponsored by the National Education Association to motivate children to read, in addition to helping them master basic skills. (Annual--on or near March 2, birthday of Dr. Seuss)

* Thur., March 2, 4:00 p.m. EST / 21:00 UTC - Asteroid & Dwarf Planet Ceres 0.8 degree north of the Moon; occultation: southern half of South America, Antarctic Peninsula, British territory of South Georgia Island.

* Fri., March 3 - World Wildlife Day. (March 3)

* Fri., March 3 - Employee Appreciation Day. (First Friday of March)

* Fri., March 3, 3:00 a.m. EST / 8:00 UTC - Moon at perigee: 229,324.4949 miles / 369,062 kilometers.

* Sat., March 4 (1681) - Pennsylvania Charter Day - William Penn received charter, for what became the Commonwealth of Pennsylvania, from Great Britain's King Charles II on 1681 March 4. (March 4)

* Sat., March 4 - National Grammar Day. (March 4)

* Sat., March 4, 10:00 p.m. EST / March 5, 3:00 UTC - Star Aldebaran 0.2 degree south of the Moon; occultation: Soloman Islands, Micronesia, Hawaii, North America, Central America, western portion of the Caribbean Sea.

* March 5 to 11 - Teen Tech Week.

* March 5 to 11 - National Consumer Protection Week. (First full week of March)

* March 5 to 12 - Sleep Awareness Week®. (Last day of week coincides, each year, with conversion to Daylight Saving Time)

* Sun., March 5 (1868) - Anniversary: Railway Air Brake patented by George Westinghouse. (March 5)

* Sun., March 5, 6:32 a.m. EST / 11:32 UTC - Primary Moon Phase: First Quarter.

* Mon., March 6, 7:00 p.m. EST / March 7, 0:00 UTC - Mercury in superior conjunction with the Sun (Mercury not visible, even with a telescope).

* Wed., March 8 - International Women's Day. (March 8)

* Thur., March 9, 1:24 a.m. EST / 6:24 UTC - Close approach: Moon and Praesepe / Beehive Open Star Cluster.

* Fri., March 10 (1982) - 1982 date of first alignment of our Solar System's nine planets (including Pluto, which at that time was still considered a planet) since A.D. 1128. A 1974 book, The Jupiter Effect, had erroneously predicted several catastrophes to occur on this date in 1982, including a major earthquake on the San Andreas Fault in California. (March 10)

* Fri., March 10 (1876) - Anniversary: First successful telephone transmission of clear speech - when Alexander Graham Bell transmitted, "Mr. Watson, come here, I want to see you." Three days earlier, on March 7, Alexander Graham Bell received a U.S. patent for the telephone. (March 10)

* Fri., March 10, 6:00 p.m. EST / 23:00 UTC - Star Regulus 0.8 degree north of the Moon; occultation: southeastern portion of South America, British territory of South Georgia Island, Norwegian territory of Queen Maud Land on Antarctica, southern tip of South Africa.

* Sat., March 11, Sunset (Pittsburgh - Sunset: 6:23 p.m. EST / 23:23 UTC) - Purim - Jewish holiday that commemorates the saving of the Jewish people from Haman, in the ancient Persian Empire, who was planning to kill all the Jews.

* March 12 to 18 - Wildfire Prevention Week. [Pennsylvania: Spring (Second week of March), Autumn]

* Sun., March 12 - Day of Planetaria. (Sunday in mid-March)

* Sun., March 12 (1912) - Anniversary of the founding of the Girl Scouts of the United States of America. (March 12)

* Sun., March 12 (1989) - Anniversary of the original proposal founding the World Wide Web on the Internet. (March 12)

* Sun., March 12, 2:00 a.m. Prevailing Local Time (Standard Time) - DAYLIGHT SAVING TIME BEGINS - Beginning in 2007, EARLY DUE TO NEW FEDERAL LAW. Civil Time changes from 2:00 a.m. Standard Time to 3:00 a.m. Daylight Saving Time (Second Sunday in March, 2:00 a.m. Prevailing Local Time).
Some States to Abandon Daylight Saving Time ?
Science of Daylight Saving Time.

* Sun., March 12, 10:54 a.m. EDT / 14:54 UTC - Primary Moon Phase: Full Moon (Worm Moon).

* March 13 to 19 - Brain Awareness Week. (Second full week of March)

* Mon., March 13 (1781) - Anniversary of the Planet Uranus discovery announced by Sir Frederick William Herschel. (March 13)

* Mon., March 13 (1938), 8:00 a.m. Prevailing Time - Anniversary of beginning of the radio news program CBS World News Roundup, the longest-running, network news broadcast in America. (March 13)

* Tue., March 14 - Zodiacal Light visible, with difficulty, after evening twilight in the western sky of the Northern Hemisphere, for the next two weeks. (February, March)

* Tue., March 14 - Pi Day, a holiday commemorating the mathematical constant π (pi). (March 14: 3.14)

* Tue., March 14, 4:00 p.m. EDT / 20:00 UTC - Jupiter 2 degrees south of the Moon (closest approach: 5:35 p.m. EDT / 21:35 UTC).

* Tue., March 14, 11:00 p.m. EDT / March 15, 3:00 UTC - Asteroid Pallas in conjunction with the Sun (Pallas not visible, even with a telescope).

* March 15 to April 16 - Annual National Cherry Blossom Festival, Washington DC. (~ Vernal Equinox to early April)

* Wed., March 15 - Ides of March. (March 15)
Also see: Ides of March article on StarDate.

* Wed., March 15 - Buzzards return to Hinckley, Ohio (Cleveland suburb). (March 15)

* Wed., March 15 (1892) - First patent granted for the invention of the escalator, which resulted in production of the first escalator installed on the Old Iron Pier at Coney Island in New York City in 1896. (March 15)

* Thur., March 16 - Equilux - The actual day with equal hours and minutes of the Sun above the horizon, and equal hours and minutes of the Sun below the horizon. Occurs twice each year, approximately 3-to-4 days before the Vernal Equinox and 3-to-4 days after the Autumnal Equinox. (March 16, September 25)

* Thur., March 16 - Freedom of Information Day, the birthday of James Madison, who is widely regarded as the Father of the Constitution and as the foremost advocate for openness in government. (March 16)

* Fri., March 17 - St. Patrick's Day. (March 17)

* Sat., March 18, 1:00 p.m. EDT / 17:00 UTC - Moon at apogee: 251,437.853 miles / 404,650 kilometers.

* March 19 to 31 - Tsunami Preparedness Weeks.

* Sun., March 19 - St. Joseph's Day - Swallows return to Mission San Juan Capistrano, California. (March 19)

* March 20 to 26 - Pennsylvania Medicine Cabinet Clean-up Week. (Week Beginning with the Vernal Equinox)

* March 20 to 26 - Fix-a-Leak Week. (U.S. Environmental Protection Agency: March)

* March 20 to 29 - CITIZEN SCIENCE - Annual Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Mon., March 20 - Sun - Earth Day. (NASA: Day of, or near, the Vernal Equinox, the first day of Spring)

* Mon., March 20, 6:00 a.m. EDT / 10:00 UTC - Saturn 3 degrees south of the Moon.

* Mon., March 20, 6:29 a.m. EDT / 10:29 UTC - Vernal Equinox - Spring Season begins in Northern Hemisphere of Earth. (~March 20)
Beginning of New Year (Solar Calendar) in Afghanistan and Iran / Persia (Nowruz), including being a holy day for the Zoroastrian Religion, and Bahá'í Naw-Rúz, one of nine holy days of the Bahá'í Faith. (~ March 19, 20, 21)

* Mon., March 20, 11:58 a.m. EDT / 15:58 UTC - Primary Moon Phase: Last Quarter.

* Tue., March 21 - World Poetry Day. (March 21)

* Tue., March 21 (1617) - 400th Anniversary of the Funeral of Native American Pocahontas (a.k.a. Rebecca Rolfe) at age ~ 21. (March 21)

* Wed., March 22 - World Water Day. (March 22)

* Wed., March 22, 1:53 a.m. EDT / 5:53 UTC - Very close approach: Moon and Dwarf Planet Pluto.

* Thur., March 23 (1989) - Apollo Asteroid 1989FC, with a diameter of 300 meters, comes within 690,000 kilometers of the Earth in 1989. (March 23)

* Thur., March 23 - Mercury at perihelion.

* Sat., March 25 - Feast of the Annunciation observed nine full months before Christmas Day. The Feast of the Annunciation on March 25 (also the Vernal Equinox in the "original" Julian Calendar adopted by the second king of Rome, Numa Pompilius, in the 7th century B.C.) had been considered the beginning of the New Year, until the Gregorian Calendar reform, when Pope Gregory XIII chose the Feast of the Circumcision of Christ (Jan. 1) as the beginning of the New Year in the Roman Catholic Church's Liturgical Year. (March 25)

* Sat., March 25 - Lady Day in England, the first of the four traditional English quarter days, was New Year's Day up to 1752 when, following the move from the Julian Calendar to the Gregorian Calendar, January 1 became the start of the year. Lady Day (for the Virgin Mary) is the traditional name of the Feast of the Annunciation of the Blessed Virgin (March 25) in some English-speaking countries. (March 25)

* Sat., March 25, 6:00 a.m. EDT / 10:00 UTC - Venus in inferior conjunction with the Sun (Venus not visible, even with a telescope).

* Sat., March 25, 8:30 to 9:30 p.m. Prevailing Local Time - Earth Hour annual environmental observance. (Saturday Late in March, 8:30 to 9:30 p.m. Prevailing Local Time)

* March 26 to April 1 - National Week of the Ocean.

* Sun., March 26, 4:00 a.m. EDT / 8:00 UTC - Neptune 0.005 degree north of the Moon; occultation: British territory of Ascension Island, South Africa, northern portion of Madagascar, Yemen, Oman, southwestern portion of Asia.

* March 27 to 31 - Solar Week. (Mid-to-Late March, Mid-to-Late October)

* March 27 to 31 - Flood Safety Awareness Week. (Pennsylvania: March).

* March 27 to 31 - Open Education Week. (Last week of March)

* Mon., March 27, 2:00 a.m. EDT / 6:00 UTC - Mercury 2 degrees north of Uranus.

* Mon., March 27, 10:57 p.m. EDT / March 28, 2:57 UTC - Primary Moon Phase: New Moon - Lunation # 1166.

* Tue., March 28 - Diabetes Alert Day. (Fourth Tuesday of March)

* Wed., March 29 (1848) - Anniversary: Ice jam stops flow of Niagara Falls for about 30 hours. (March 29)

* Wed., March 29, 12:56 a.m. EDT / 4:56 UTC - Close approach: Moon and Uranus.

* Thur., March 30 - Pennsylvania Female Veterans' Day. (March 30)

* Thur., March 30 - National Doctors' Day. (March 30)

* Thur., March 30 - World Bi-Polar Day, International Society for Bi-Polar Disorders, Pittsburgh. (March 30)

* Thur., March 30, 9:00 a.m. EDT / 13:00 UTC - Moon at perigee: 226,087.7724 miles / 363,853 kilometers.

* Thur., March 30, 11:33 a.m. EDT / 15:33 UTC - Close approach: Moon and Mars.

* Fri., March 31 - World Back-Up Day. (March 31)

* Fri., March 31 (1851) - Anniversary: Jean Leon Foucault first demonstrates, to the general public, in the Pantheon in Paris, the Foucault Pendulum, which is a proof that the Earth rotates on its axis. He had invented the device on 1851 January 8 and first demonstrated it to scientists on 1851 February 3.
Near the end of his life, Jean Leon Foucault also developed the Siderostat-type Refractor Telescope. (March 31)

* Fri., March 31 - Last day of Calendar Year First Quarter. (March 31)

Return to History of The Buhl Planetarium and Institute of Popular Science, Pittsburgh

Astronomical Calendar - A.D. 2017

Authored By Glenn A. Walsh *** Sponsored By Friends of the Zeiss
Electronic Mail: < astrocalendar@planetarium.cc > *** Internet Web Cover Page: < http://www.planetarium.cc >
This Internet Web Page: < http://buhlplanetarium4.tripod.com/astrocalendar/2017.html >
SpaceWatchtower Blog
2017 January

Internet Web Site Master Index for the History of
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Other Internet Web Sites of Interest

History of The Buhl Planetarium and Institute of Popular Science, Pittsburgh

History of Adler Planetarium and Astronomy Museum, Chicago

Astronomer, Educator, and Telescope Maker John A. Brashear

History of Andrew Carnegie and Carnegie Libraries

Historic Duquesne Incline cable-car railway, Pittsburgh

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