Astronomy Picture of the Day ·

MACSJ0025: Two Giant Galaxy Clusters Collide

The Astronomy Picture of the Day for September 17, 2008 is “MACSJ0025: Two Giant Galaxy Clusters Collide,” an image. It is credited to Credit: NASA , ESA , CXC , M. Bradac ( UCSB ) & S. Allen ( Stanford ). The original explanation runs about 217 words.

MACSJ0025: Two Giant Galaxy Clusters Collide
Credit: NASA , ESA , CXC , M. Bradac ( UCSB ) & S. Allen ( Stanford ) Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“What happens when two of the largest objects in the universe collide? No one was quite sure, but the answer is giving clues to the nature of mysterious dark matter .”

— APOD editors, September 17, 2008

Read the full explanation on science.nasa.gov

At a glance

Date
September 17, 2008
Type
Image
Credit
Credit: NASA , ESA , CXC , M. Bradac ( UCSB ) & S. Allen ( Stanford )
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 217 words

All of September 2008 → · 2008 by month → · Full archive since 1995 →

Topics in this entry

Galaxies

Topics are matched from words in the title and explanation.

On this day: September 17 in other years

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Source

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.