This is an image of Callisto.
Click on image for full size
Callisto was first discovered by Galileo
in 1610. It is the 2nd largest moon in the solar system, and is larger than the Earth's moon. It is about as big as the distance across the United States.
Callisto is named after one of Jupiter's many girlfriends from Greek mythology.
Shop Windows to the Universe Science Store!
Learn about Earth and space science, and have fun while doing it! The games
section of our online store
includes a climate change card game
and the Traveling Nitrogen game
You might also be interested in:
The Galilean satellites are the 4 big moons of Jupiter, Io, Europa, Ganymede, and Callisto. These moons are called Galilean because they were discovered by Galileo Galilei in 1610. In this picture, Io,...more
The Galileo spacecraft has been in orbit around Jupiter for almost six years now. Earlier this spring, Galileo took these pictures of Callisto. Callisto is one of Jupiter's moons. Callisto is an icy moon...more
The Galileo mission discovered an amazing thing! Europa has its own atmosphere, although it is very, very thin. When fast moving molecules traveling through space near Jupiter hit Europa's atmosphere,...more
Galileo was a spacecraft that orbited Jupiter for eight years. It made many discoveries about Jupiter and its moons. Galileo was launched in 1989, and reached Jupiter in 1995. The spacecraft had two parts....more
Amalthea was discovered by E Barnard in 1872. Of the 17 moons it is the 3rd closest to Jupiter. Amalthea is about the size of a county or small state. Amalthea is named after the goat in Greek mythology...more
Callisto was first discovered by Galileo in 1610. It is the 2nd largest moon in the solar system, and is larger than the Earth's moon. It is about as big as the distance across the United States. Callisto...more
Measurements by the Galileo spacecraft have been shown that Callisto is the same inside from the center to the surface. This means that Callisto does not have a core at the center. This means that, unlike...more