Astronomy Picture of the Day · December 19, 2001

Finding Dark Matter

The Astronomy Picture of the Day for December 19, 2001 is “Finding Dark Matter,” an image. The picture is copyrighted by its creator (Credit & Copyright: A. J. Benson ( Caltech ) et al., U. Durham , PPARC). The original explanation runs about 152 words.

From the explanation

“Where is dark matter ? Galaxies rotate and move in clusters as if a tremendous amount of unseen matter is present.”

— APOD editors, December 19, 2001

Read the full explanation on science.nasa.gov

At a glance

Date: December 19, 2001
Type: Image
Credit: Credit & Copyright: A. J. Benson ( Caltech ) et al., U. Durham , PPARC
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 152 words

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Topics in this entry

Galaxies

Topics are matched from words in the title and explanation.

On this day: December 19 in other years

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Source

Astronomy Picture of the Day, December 19, 2001 — science.nasa.gov/image-article/apod-2001-december-19-finding-dark-matter

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.