Astronomy Picture of the Day ·

A Quasar Portrait Gallery

The Astronomy Picture of the Day for December 6, 1997 is “A Quasar Portrait Gallery,” an image. It is credited to Credit: J. Bahcall (IAS, Princeton), M. Disney (Univ. Wales), NASA. The original explanation runs about 127 words.

A Quasar Portrait Gallery
Credit: J. Bahcall (IAS, Princeton), M. Disney (Univ. Wales), NASA Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“QUASARs (QUASi-stellAR objects) lie near the edge of the observable Universe . Discovered in 1963 , astronomers were astounded that such objects could be visible across billions of light-years, as this implies they must emit prodigious amounts of energy.”

— APOD editors, December 6, 1997

Read the full explanation on science.nasa.gov

At a glance

Date
December 6, 1997
Type
Image
Credit
Credit: J. Bahcall (IAS, Princeton), M. Disney (Univ. Wales), NASA
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 127 words

All of December 1997 → · 1997 by month → · Full archive since 1995 →

Topics in this entry

Black holes

Topics are matched from words in the title and explanation.

On this day: December 6 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.