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E. M. Antoniadi born, 1870 (d. 1944).
E. M. Antoniadi born, 1870 (d. 1944).
Mar 1 all-day
E. M. Antoniadi born, 1870 (d. 1944).
Eugène Michel Antoniadi (1 March 1870 – 10 February 1944) was a Greek astronomer. He became a Fellow of the Royal Astronomical Society on 10 February 1899, and in 1890 he became one of the founding members of the British Astronomical Association (BAA). In 1892, he Continue reading →
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Charlotte E. Moore Sitterly died, 1990 (b. 1898).
Charlotte E. Moore Sitterly died, 1990 (b. 1898).
Mar 3 all-day
Charlotte Emma Moore Sitterly (September 24, 1898 – March 3, 1990) was an American astronomer. She is known for her extensive spectroscopic studies of the Sun and chemical elements. Her tables of data are known for their reliability and still Continue reading →
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Full Moon (10:48 MST).
Full Moon (10:48 MST).
Mar 9 all-day
Full Moon (10:48 MST).
Full Moon. Rises at sunset, high in the sky around midnight. Visible all night. Moon overview on solarsystem.nasa.gov Continue reading →
Moon at Perigee (23:33 MST)
Moon at Perigee (23:33 MST)
Mar 9 all-day
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Purim begins at sundown (Jewish).
Purim begins at sundown (Jewish).
Mar 9 all-day
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J. Garavito Armero died, 1920 (b. 1865).
J. Garavito Armero died, 1920 (b. 1865).
Mar 11 all-day
J. Garavito Armero died, 1920 (b. 1865).
Julio Garavito Armero (January 5, 1865 – March 11, 1920) was a Colombian astronomer. Born in Bogotá, he was a child prodigy in science and mathematics. He obtained his degrees as mathematician and civil engineer in the Universidad Nacional de Continue reading →
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Pi Day.
Pi Day.
Mar 14 all-day
Pi Day.
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Caroline L Herschel born, 1750 (d. 1848).
Caroline L Herschel born, 1750 (d. 1848).
Mar 16 all-day
Caroline L Herschel born, 1750 (d. 1848).
Caroline Herschel would turn 270 today. Caroline was the sister of William, a musician from Hannover whose passion for astronomy led him to surpass most academically trained astronomers of his day. He became a renowned telescope maker and one of Continue reading →
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St. Patrick
St. Patrick
Mar 17 all-day
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Mercury at Greatest Elongation.
Mercury at Greatest Elongation.
Mar 23 all-day
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World Meteorological Day.
World Meteorological Day.
Mar 23 all-day
World Meteorological Day.
The World Meteorological Organization turns 71 today. The WMO is a specialized agency of the United Nations, based in Geneva. It “is dedicated to international cooperation and coordination on the state and behaviour of the Earth’s atmosphere, its interaction with Continue reading →
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Moon at Apogee (08:23 MST).
Moon at Apogee (08:23 MST).
Mar 24 all-day
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New Moon (02:28 MST).
New Moon (02:28 MST).
Mar 24 all-day
New Moon (02:28 MST).
By the modern definition, New Moon occurs when the Moon and Sun are at the same geocentric ecliptic longitude. The part of the Moon facing us is completely in shadow then. Pictured here is the traditional New Moon, the earliest visible Continue reading →
Venus at Greatest Elongation.
Venus at Greatest Elongation.
Mar 24 all-day
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Mercury at Aphelion.
Mercury at Aphelion.
Mar 26 all-day
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Cesar Chavez Day, born 1927, Yuma, AZ.
Cesar Chavez Day, born 1927, Yuma, AZ.
Mar 31 all-day
Cesar Chavez Day, born 1927, Yuma, AZ.
Cesar Chavez (born César Estrada Chávez, locally [ˈsesaɾ esˈtɾaða ˈtʃaβes]; March 31, 1927 – April 23, 1993) was an American labor leader and Latino American civil rights activist. Along with Dolores Huerta, he co-founded the National Farm Workers Association, later renamed Continue reading →

NGC 3561, by Adam Block/Mount Lemmon SkyCenter/University of Arizona, USA. Billions and billions of galaxies, or at least hundreds can be seen in this galaxy cluster dominated by interacting pair NGC 3561 A and NGC 3561 B.