Astronomy Picture of the Day ·

A Horseshoe Einstein Ring from Hubble

The Astronomy Picture of the Day for December 21, 2011 is “A Horseshoe Einstein Ring from Hubble,” an image. It is credited to Image Credit: ESA / Hubble & NASA. The original explanation runs about 187 words.

A Horseshoe Einstein Ring from Hubble
Credit: Image Credit: ESA / Hubble & NASA Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“What’s large and blue and can wrap itself around an entire galaxy? A gravitational lens mirage.”

— APOD editors, December 21, 2011

Read the full explanation on science.nasa.gov

At a glance

Date
December 21, 2011
Type
Image
Credit
Credit: Image Credit: ESA / Hubble & NASA
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 187 words

All of December 2011 → · 2011 by month → · Full archive since 1995 →

Topics in this entry

GalaxiesHubble Space Telescope

Topics are matched from words in the title and explanation.

On this day: December 21 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.