SpaceAstronomer
@spaceastronomer
SpaceAstronomer. Alfonso Fernandez-Barandiaran MSc in Physics, Computer Science professional & amateur astronomer. Astronomy, Space, Astronomía, Espacio
ID: 227661919
https://www.spaceastronomer.com 17-12-2010 13:05:39
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Two gigantic groups of galaxies are smashing into one another at more than 6 million kilometers per hour in NGC 6338. With a total mass of roughly 100 trillion times the mass of our Sun. By Chandra Observatory
A new Chandra study shows that there are 1,075 stars within 4 light-years of the center of the Westerlund 1 star cluster. To get a sense of how crowded this is, 4 light-years is about the distance between the Sun and the next closest star to Earth! by Chandra Observatory