Astronomy Picture of the Day ·

A SWAN, an ATLAS, and Mars

The Astronomy Picture of the Day for September 26, 2025 is “A SWAN, an ATLAS, and Mars,” an image. The picture is copyrighted by its creator (Image Credit & Copyright: Adam Block). The original explanation runs about 166 words.

A SWAN, an ATLAS, and Mars
Credit: Image Credit & Copyright: Adam Block Copyrighted Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“A new visitor to the inner Solar System, comet C/2025 R2 (SWAN) sports a long ion tail extending diagonally across this almost 7 degree wide telescopic field of view recorded on September 21 .”

— APOD editors, September 26, 2025

Read the full explanation on science.nasa.gov

At a glance

Date
September 26, 2025
Type
Image
Credit
Credit: Image Credit & Copyright: Adam Block
Copyright
Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length
About 166 words

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Topics in this entry

The SunMarsComets

Topics are matched from words in the title and explanation.

On this day: September 26 in other years

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Source

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.