Astronomy Picture of the Day ·

Galactic Supernova Remnant IC 443

The Astronomy Picture of the Day for July 21, 1999 is “Galactic Supernova Remnant IC 443,” an image. It is credited to Credit: 2MASS Collaboration, U. Mass., IPAC. The original explanation runs about 128 words.

Galactic Supernova Remnant IC 443
Credit: 2MASS Collaboration, U. Mass., IPAC Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“About 8000 years ago, a star in our Galaxy exploded. Ancient humans might have noticed the supernova as a temporary star, but modern humans can see the expanding shell of gas even today.”

— APOD editors, July 21, 1999

Read the full explanation on science.nasa.gov

At a glance

Date
July 21, 1999
Type
Image
Credit
Credit: 2MASS Collaboration, U. Mass., IPAC
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 128 words

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

Topics in this entry

GalaxiesSupernovae

Topics are matched from words in the title and explanation.

On this day: July 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.