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Ganymede, or Jupiter III, is the largest and most massive natural satellite of Jupiter, and in the Solar System. Despite being the only moon in the Solar System with a substantial magnetic field , it is the largest Solar System object without a substantial atmosphere.
Sun-Earth L2: In service: 2021– Phobos 1: 6,220 kg (13,713 lb) Soviet Mars Spacecraft that missed its orbital insertion burn: Solar Orbit: Lost contact 1988: 1988 Europa Clipper: 6,065 kg (13,371 lb) Jupiter and Europa science probe with an ETA in 2030. Solar Orbit on route to Jupiter: In service: 2024– Jupiter Icy Moons Explorer: 5,963 kg ...
It was referred to as "Jupiter I", or "The first satellite of Jupiter" until the mid-20th century. [14] With over 400 active volcanos, Io is the most geologically active object in the Solar System. [25] Its surface is dotted with more than 100 mountains, some of which are taller than Earth's Mount Everest. [26]
At a distance of about 11,400,000 km (7,100,000 mi) from Jupiter, Himalia takes about 250 Earth days to complete one orbit around Jupiter. [16] It is the largest member of the Himalia group, which are a group of small moons orbiting Jupiter at a distance from 11,400,000 km (7,100,000 mi) to 13,000,000 km (8,100,000 mi), with inclined orbits at ...
The seven largest natural satellites in the Solar System (those bigger than 2,500 km across) are Jupiter's Galilean moons (Ganymede, Callisto, Io, and Europa), Saturn's moon Titan, Earth's moon, and Neptune's captured natural satellite Triton. Triton, the smallest of these, has more mass than all smaller natural satellites together.
Mars and Jupiter are cozying up in the night sky for their closest rendezvous this decade. In reality, our solar system’s biggest planet and its dimmer, reddish neighbor will be more than 350 ...
Astronomers have identified a planet that’s bigger than Jupiter yet surprisingly as fluffy and light as cotton candy. The gas giants in our solar system — Jupiter, Saturn, Uranus and Neptune ...
The largest of these may have a hydrostatic-equilibrium shape, but most are irregular. Most of the trans-Neptunian objects (TNOs) listed with a radius smaller than 200 km have " assumed sizes based on a generic albedo of 0.09" since they are too far away to directly measure their sizes with existing instruments.