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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
Ganymede participates in orbital resonances with Europa and Io: for every orbit of Ganymede, Europa orbits twice and Io orbits four times. [41] [42] Conjunctions (alignment on the same side of Jupiter) between Io and Europa occur when Io is at periapsis and Europa at apoapsis. Conjunctions between Europa and Ganymede occur when Europa is at ...
Ganymede and Europa are two of the four largest moons orbiting Jupiter, known as the Galilean moons. Europa is similar in size to Earth’s Moon, while Ganymede is the largest moon in the whole ...
Europa's prime meridian is a line passing through this point. [41] Research suggests that tidal locking may not be full, as a non-synchronous rotation has been proposed: Europa spins faster than it orbits, or at least did so in the past. This suggests an asymmetry in internal mass distribution and that a layer of subsurface liquid separates the ...
The names Io, Europa, Ganymede, and Callisto became popular in the mid-20th century, [47] whereas the rest of the moons remained unnamed and were usually numbered in Roman numerals V (5) to XII (12). [ 48 ] [ 49 ] Jupiter V was discovered in 1892 and given the name Amalthea by a popular though unofficial convention, a name first used by French ...
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 ...
Euler diagram showing the types of bodies orbiting the Sun. The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun.Most named objects in this list have a diameter of 500 km or more.
During this observation, the three stars in a line to the west of Jupiter were (from east to west): Io, Europa, and Ganymede. [9] This was the first time that Io and Europa were observed and recorded as distinct points of light so this date, January 8, 1610 is used as the discovery date for the two moons by the International Astronomical Union ...