Astronomy Picture of the Day ·

NGC 922: Collisional Ring Galaxy

The Astronomy Picture of the Day for December 17, 2012 is “NGC 922: Collisional Ring Galaxy,” an image. It is credited to Image Credit: NASA , ESA ; Acknowledgement: Nick Rose. The original explanation runs about 184 words.

NGC 922: Collisional Ring Galaxy
Credit: Image Credit: NASA , ESA ; Acknowledgement: Nick Rose Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“Why does this galaxy have so many big black holes? No one is sure.”

— APOD editors, December 17, 2012

Read the full explanation on science.nasa.gov

At a glance

Date
December 17, 2012
Type
Image
Credit
Credit: Image Credit: NASA , ESA ; Acknowledgement: Nick Rose
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 184 words

All of December 2012 → · 2012 by month → · Full archive since 1995 →

Topics in this entry

GalaxiesBlack holes

Topics are matched from words in the title and explanation.

On this day: December 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.