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The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and interactions of the Galileo and Cassini orbiters; however, many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, have far less certain masses. [5]
The sizes are listed in units of Jupiter radii (R J, 71 492 km).This list is designed to include all planets that are larger than 1.6 times the size of Jupiter.Some well-known planets that are smaller than 1.6 R J (17.93 R 🜨 or 114 387.2 km) have been included for the sake of comparison.
Kepler-6b is just larger than Jupiter, represented in green. Kepler-6 has one confirmed extrasolar planet; it is a gas giant named Kepler-6b. [13] The planet is approximately .669 M J, or some two-thirds the mass of planet Jupiter. It is also slightly more diffuse than Jupiter, with a radius of approximately 1.323 R J.
20 km – diameter of the least massive neutron stars (1.44 solar masses) 20 km – diameter of Leda, one of Jupiter's moons; 20 km – diameter of Pan, one of Saturn's moons; 22 km – diameter of Phobos, the larger moon of Mars; 27 km – height of Olympus Mons above the Mars reference level, [157] [158] the highest-known mountain of the ...
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 ...
Although Jupiter would need to be about 75 times more massive to fuse hydrogen and become a star, [68] its diameter is sufficient as the smallest red dwarf may be slightly larger in radius than Saturn. [69] Jupiter radiates more heat than it receives through solar radiation, due to the Kelvin–Helmholtz mechanism within its contracting interior.
It is slightly larger than Jupiter, around 8%. The angular separation of the planet from its parent star is about 2.5 arcseconds, corresponding to a projected separation of 44.7 AU, [2] which is nearly nine times the distance between Jupiter and the Sun, which poses a challenge to theoretical ideas of how giant planets form. [5]
Scientists have discovered a giant planet orbiting a massive pair of extremely hot stars, an environment previously thought too inhospitable for a planet to