Why does Jupiter have rings? Jupiter's rings were discovered in 1979 by the passing Voyager 1 spacecraft , but their origin was a mystery. Data from the Galileo spacecraft currently orbiting Jupiter later confirmed that these rings were created by meteoroid impacts on small nearby moons . As a small meteoroid strikes tiny Adrastea , for example, it will bore into the moon, vaporize, and explode dirt and dust off into a Jovian orbit . Pictured above is an eclipse of the Sun by Jupiter, as viewed from Galileo. Small dust particles high in Jupiter's atmosphere , as well as the dust particles that compose the rings , can be seen by reflected sunlight .
Anniversary: APOD Turns Seven
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Credit: M. Belton ( NOAO ), J. Burns ( Cornell ) et al. , Galileo Project , JPL , NASA