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Galilean satellite |
Also found in: Wikipedia | 0.04 sec. |
Galilean satelliteAny of the four large satellites of Jupiter discovered by Galileo in 1610. In order of distance from Jupiter: Io (the most volcanically active body in the solar system), Europa (suspected to contain a liquid ocean under its frozen surface), Ganymede (the largest satellite in the solar system), and Callisto. Both Ganymede and Callisto are larger than Pluto and Mercury. |
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Other highlights of the session included a long look at Aldebaran, the bright-red star that serves as the bull's-eye in the Taurus constellation, as well as the four Galilean moons of Jupiter lined up in a neat row. Today, these four large satellites of Jupiter--the Galilean moons Io, Europa, Ganymede, and Callisto--are becoming familiar faces in the firmament. |
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