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Whether Ganymede has an ionosphere associated with its atmosphere is unresolved. [24] Ganymede's surface is composed of two main types of terrain, the first of which are lighter regions, generally crosscut by extensive grooves and ridges, dating from slightly less than 4 billion years ago, covering two-thirds of Ganymede.
The largest, Ganymede, is the largest moon in the Solar System and surpasses the planet Mercury in size (though not mass). Callisto is only slightly smaller than Mercury in size; the smaller ones, Io and Europa, are about the size of the Moon. The three inner moons — Io, Europa, and Ganymede — are in a 4:2:1 orbital resonance with
Complex plasma interactions in Io's atmosphere create immense electrical currents which couple to Jupiter's atmosphere. [160] [247] Several lines of evidence from Galileo support the theory that liquid oceans exist under Europa's icy surface. [160] [247] Ganymede possesses its own, substantial magnetic field – the first satellite known to ...
A slight attenuation of the signal before and after the occultation showed that Io had an ionosphere, suggesting the presence of a thin atmosphere with a pressure of 1.0 × 10 −7 bar, though the composition was not determined. [33] This was the second atmosphere to be discovered around a moon of an outer planet, after Saturn's moon Titan.
Transfer to Ganymede: A series of Callisto and Ganymede gravity assists will be performed to gradually reduce Juice's speed by 1,600 m/s (3,600 mph). Finally, a series of distant ~45,000 km (28,000 mi) flybys of the far side of Ganymede (near the Jupiter-Ganymede-L2 Lagrange point ) will further reduce the required orbital insertion delta-V by ...
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Today's Wordle Answer for #1248 on Monday, November 18, 2024. Today's Wordle answer on Monday, November 18, 2024, is FRAIL. How'd you do? Next: Catch up on other Wordle answers from this week.
The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure. [11]
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