JULIAN BAUM / NEW SCIENTIST / SCIENCE PHOTO LIBRARY JULIAN BAUM / NEW SCIENTIST / SCIENCE PHOTO LIBRARY
Illustration entitled "Kirkwod Gaps in the Asteroid Belt". The Kirkwood Gaps are regions of very low density in the Asteroid Belt between Mars and Jupiter. Discovered in 1857 by US mathematician Daniel Kirkwood, they are thought to be the result of the gravitational influence of Jupiter. The planet Jupiter is seen at the right edge, with the volcanic surface of the moon Io at bottom right. At top left is another of Jupiter's moons, Europa.
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