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APOD
Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Jupiter, Io, and Ganymede's Shadow
Explanation: Jupiter , the solar system 's largest planet, is seen here next to Io , its closest Galilean moon. On the cloud tops of Jupiter near the left edge of the picture can be seen a dark circular spot which is caused by the shadow of Jupiter 's largest moon Ganymede . Jupiter 's cloud tops show light bands and dark belts. The clouds are primarily composed of hydrogen and helium , but their intense colors are probably caused by very small amounts of heavier elements such as sulfur or organic (carbon-containing) compounds.
| Date | October 13, 1995 |
|---|---|
| Credit | Credit: NASA, Voyager |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |