Astronomy Picture of the Day · March 21, 2011

The CMB Cold Spot

The Astronomy Picture of the Day for March 21, 2011 is “The CMB Cold Spot,” an image. It is credited to Credit: WMAP Science Team , NASA. The original explanation runs about 198 words.

From the explanation

“How could part of the early universe be so cold? No one is sure, and many astronomers now think that the CMB Cold Spot on the cosmic microwave background (CMB) radiation is not particularly noteworthy.”

— APOD editors, March 21, 2011

Read the full explanation on science.nasa.gov

At a glance

Date: March 21, 2011
Type: Image
Credit: Credit: WMAP Science Team , NASA
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 198 words

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Source

Astronomy Picture of the Day, March 21, 2011 — science.nasa.gov/image-article/apod-2011-march-21-the-cmb-cold-spot

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.