Astronomy Picture of the Day · February 22, 2001

3C294: Distant X-Ray Galaxy Cluster

The Astronomy Picture of the Day for February 22, 2001 is “3C294: Distant X-Ray Galaxy Cluster,” an image. It is credited to Credit: A. Fabian ( IoA Cambridge ) et al., NASA. The original explanation runs about 161 words.

From the explanation

“Large clusters of galaxies are the most massive objects in the universe. Astronomers now realize that a hallmark of these cosmic behemoths are gas clouds with temperatures of tens of millions of degrees that pervade the clusters and radiate strongly in x-rays.”

— APOD editors, February 22, 2001

Read the full explanation on science.nasa.gov

At a glance

Date: February 22, 2001
Type: Image
Credit: Credit: A. Fabian ( IoA Cambridge ) et al., NASA
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 161 words

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Topics in this entry

Galaxies

Topics are matched from words in the title and explanation.

On this day: February 22 in other years

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Source

Astronomy Picture of the Day, February 22, 2001 — science.nasa.gov/image-article/apod-2001-february-22-3c294-distant-x-ray-galaxy-cluster

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.