December 29th 2012
http://apod.nasa.gov/apod/ap121229.html
This picture depicts the runaway star Zeta Ophiuchi, and its arching interstellar bow shock wave. Z.O. is about 20 times as large as our sun, and is believed to have started as a star in a binary star system, but after its partner star went supernova, it was sent off at extreme speeds into space. It is now traveling at 24 km/s towards the left of the picture. The red and white wave leading the star is its shock wave, or stellar wind.
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