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APOD
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.
A Distant Cluster of Galaxies
Explanation: Every bright object in this 1994 photograph by the Hubble Space Telescope is a galaxy . Oddly - most of the objects are spiral galaxies. This rich cluster of galaxies , named CL 0939+4713 , is almost half way across the visible universe. Photos like this indicate that clusters in the past contained a higher fraction of spirals than do nearby clusters , which are usually dominated by elliptical galaxies .
| Date | January 14, 1996 |
|---|---|
| Credit | Credit: NASA, HST, A. Dressler (CIW) |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |