Wikipedia:Main Page history/2017 March 12

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The Homunculus Nebula, surrounding Eta Carinae, imaged by WFPC2 at red and near-ultraviolet wavelengths

Eta Carinae is a stellar system of at least two stars with a combined luminosity over five million times that of the Sun, around 7500 light-years distant in the constellation Carina. First recorded as a 4th-magnitude star, it brightened considerably beginning in 1837 in an event known as the Great Eruption, becoming the second-brightest star in the sky between 11 and 14 March 1843 before fading well below naked eye visibility. It has been getting brighter again since about 1940, peaking above magnitude 4.5 in 2014. Eta Carinae is always above the horizon south of latitude 30°S, and never visible north of about latitude 30°N. The two main stars of the system orbit each other with a period of 5.54 years. The primary is a peculiar star similar to a luminous blue variable, initially 150–250 times as massive as the Sun but now at least 30 solar masses lighter, and is expected to eventually explode as a supernova. The secondary star is hot and also highly luminous, around 30–80 times as massive as the Sun. The system is heavily obscured by the Homunculus Nebula, material ejected from the primary during the Great Eruption. (Full article...)

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Audrey Hepburn in 1953
Audrey Hepburn

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Park Geun-hye
Park Geun-hye

On this day...

March 12: Shushan Purim begins at sunset in Jerusalem and Susa (Judaism, 2017)

Harry S. Truman
Harry S. Truman

Charles Boycott (b. 1832) · Jessica Hardy (b. 1987) · Lazare Ponticelli (d. 2008)

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Today's featured picture

Chapel of the Gate of Dawn

The Chapel of the Gate of Dawn is a Catholic chapel and pilgrimage site on the city gates of the Lithuanian city of Vilnius. It is home to Our Lady of the Gate of Dawn, a painting of the Blessed Virgin Mary in the Northern Renaissance style. In this image, the painting is covered in expensive and elaborate silver and gold clothes, leaving only the face and hands visible.

Legend tells that in 1702, when Vilnius was captured by the Swedish army during the Great Northern War, Our Lady of the Gate of Dawn rescued the city: at dawn, the heavy iron city gates of the gate fell, killing four Swedish soldiers and promoting a successful Lithuanian counter-attack near the gate.

Photograph: David Iliff

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