Astronomy Picture of the Day ·

Candidates for a Hypernova

The Astronomy Picture of the Day for April 20, 1999 is “Candidates for a Hypernova,” an image. It is credited to Credit: Y. Chu (UIUC) et al., POSS, ROSAT, MDM, HST. The original explanation runs about 148 words.

Candidates for a Hypernova
Credit: Y. Chu (UIUC) et al., POSS, ROSAT, MDM, HST Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“What created these huge explosion remnants? Speculation has been building recently that outbursts even more powerful than well-known supernovae might occur.”

— APOD editors, April 20, 1999

Read the full explanation on science.nasa.gov

At a glance

Date
April 20, 1999
Type
Image
Credit
Credit: Y. Chu (UIUC) et al., POSS, ROSAT, MDM, HST
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 148 words

All of April 1999 → · 1999 by month → · Full archive since 1995 →

Topics in this entry

Supernovae

Topics are matched from words in the title and explanation.

On this day: April 20 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.