Jupiter's four innermost known satellites 9.9
Jupiter's four innermost known satellites, imaged by Galileo and shown at their correct relative sizes. From left to right: Metis (60 km long), Adastrea (20 km long), Amalthea (247 km long) and Thebe (116 km long). Two views are shown for Amalthea and Thebe: top the leading hemisphere, bottom the trailing hemisphere.
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Image Credit: NASA, David A. Rothery (text)