Astronomy Picture of the Day · January 3, 2000

Cas A Supernova Remnant in X-Rays

The Astronomy Picture of the Day for January 3, 2000 is “Cas A Supernova Remnant in X-Rays,” an image. It is credited to Credit: John Hughes et al. ( Rutgers ), NASA / CXC / SAO. The original explanation runs about 148 words.

From the explanation

“The complex shell of a star seen to explode 300 years ago is helping astronomers to understand how that star exploded. The above recently released image of supernova remnant Cassiopeia A (Cas A) shows unprecedented detail in three X-ray colors.”

— APOD editors, January 3, 2000

Read the full explanation on science.nasa.gov

At a glance

Date: January 3, 2000
Type: Image
Credit: Credit: John Hughes et al. ( Rutgers ), NASA / CXC / SAO
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 148 words

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Topics in this entry

Supernovae

Topics are matched from words in the title and explanation.

On this day: January 3 in other years

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Source

Astronomy Picture of the Day, January 3, 2000 — science.nasa.gov/image-article/apod-2000-january-03-cas-a-supernova-remnant-in-x-rays

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.