Astronomy

Astronomy

The scientific study of planets, stars, black holes, comets and other celestial bodies that make up outer space.

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Astronomy > Solar system

Ganymede

Astronomy; Solar system

The third Galilean moon outward from Jupiter and the largest moon in the Solar System. It has a diameter of 5,268 km (3,273 mi) and has the highest mass out of all the planetary ...

Europa

Astronomy; Solar system

The second closest moon to Jupiter and the smallest of the four Galilean moons with a diameter of just over 3,100 km (1,900 mi). It was discovered in 1610 by Galileo Galilei and ...

Io

Astronomy; Solar system

The Galilean moon closest to Jupiter and the fourth-largest moon in the Solar System with a diameter of 3,642 km (2,263 mi). It was discovered in 1610 by Galileo Galilei and named ...

Titan

Astronomy; Solar system

The largest of Saturn's moons and the second largest moon in the solar system (after Jupiter's moon Ganymede). Titan's diameter is about 50% larger than the Moon's. It was ...

Titania

Astronomy; Solar system

The largest moon of Uranus and the eighth largest moon in the Solar System with a diameter of 1,578 km (981 mi). It was discovered in 1787 by William Herschel and named after the ...