Astronomy Picture of the Day · December 9, 1997

Mysterious Features on Ganymede

The Astronomy Picture of the Day for December 9, 1997 is “Mysterious Features on Ganymede,” an image. It is credited to Credit: The Galileo Project, NASA. The original explanation runs about 109 words.

From the explanation

“Where is the rest of the circle? Jupiter ‘s largest moon Ganymede has some truly unusual terrain, including the pictured half circle above cut by nearly parallel curves.”

— APOD editors, December 9, 1997

Read the full explanation on science.nasa.gov

At a glance

Date: December 9, 1997
Type: Image
Credit: Credit: The Galileo Project, NASA
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 109 words

All of December 1997 → · 1997 by month → · Full archive since 1995 →

Topics in this entry

Jupiter

Topics are matched from words in the title and explanation.

On this day: December 9 in other years

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Source

Astronomy Picture of the Day, December 9, 1997 — science.nasa.gov/image-article/apod-1997-december-09-mysterious-features-on-ganymede

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.