Astronomy Picture of the Day ·

Callisto: Dirty Battered Iceball

The Astronomy Picture of the Day for September 1, 2025 is “Callisto: Dirty Battered Iceball,” an image. It is credited to Image Credit: NASA , JPL-Caltech , Voyager 2 ; Processing & License : Kevin M. Gill ;. The original explanation runs about 162 words.

A dark spherical body is shown that has many light craters. Please see the explanation for more detailed information.
Credit: Image Credit: NASA , JPL-Caltech , Voyager 2 ; Processing & License : Kevin M. Gill ; Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“Its surface is the most densely cratered in the Solar System — but what’s inside? Jupiter ‘s moon Callisto is a battered ball of dirty ice that is slightly smaller than the planet Mercury .”

— APOD editors, September 1, 2025

Read the full explanation on science.nasa.gov

At a glance

Date
September 1, 2025
Type
Image
Credit
Credit: Image Credit: NASA , JPL-Caltech , Voyager 2 ; Processing & License : Kevin M. Gill ;
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 162 words

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Topics in this entry

Jupiter

Topics are matched from words in the title and explanation.

On this day: September 1 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.