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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

See Explanation. Clicking on the picture will download the highest resolution version available.

The Antennae

Explanation: Some 60 million light-years away in the southerly constellation Corvus , two large galaxies collided . But the stars in the two galaxies, cataloged as NGC 4038 and NGC 4039 , don't collide in the course of the ponderous event , lasting hundreds of millions of years. Instead, their large clouds of molecular gas and dust do, triggering furious episodes of star formation near the center of the cosmic wreckage . Spanning about 500 thousand light-years, this stunning view also reveals new star clusters and matter flung far from the scene of the accident by gravitational tidal forces. Of course , the suggestive visual appearance of the extended arcing structures gives the galaxy pair its popular name - The Antennae.

Date April 29, 2011
Credit Image Credit & Copyright: Acquisition and data reduction - Andrey Oreshko (Elena Remote Observatory),
Processing - Dietmar Hager ( stargazer-observatory )
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.