Astronomy Picture of the Day · November 23, 2021

The Sun in X-rays from NuSTAR

The Astronomy Picture of the Day for November 23, 2021 is “The Sun in X-rays from NuSTAR,” an image. It is credited to Image Credit: NASA , NuSTAR , SDO. The original explanation runs about 159 words.

The featured image shows the Sun in X-ray light as shown by NASA's NuSTAR satellite -- superimposed on an image in ultraviolet light taken by NASA's Solar Dynamic Observatory. Please see the explanation for more detailed information. — Credit: Image Credit: NASA , NuSTAR , SDO Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“Why are the regions above sunspots so hot? Sunspot s themselves are a bit cooler than the surrounding solar surface because the magnetic fields that create them reduce convective heating.”

— APOD editors, November 23, 2021

Read the full explanation on science.nasa.gov

At a glance

Date: November 23, 2021
Type: Image
Credit: Credit: Image Credit: NASA , NuSTAR , SDO
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 159 words

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Topics in this entry

The Sun

Topics are matched from words in the title and explanation.

On this day: November 23 in other years

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Source

Astronomy Picture of the Day, November 23, 2021 — science.nasa.gov/image-article/apod-2021-november-23-the-sun-in-x-rays-from-nustar

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.