Giant Red Spot and Galilean satellites

Giant Red Spot and Galilean satellites

. This “family portrait” includes the edge of Jupiter with its Great Red Spot and on the same scale the planet’s four largest moons, known as the Galilean satellites. From top to bottom the moons are Io, Europa, Ganymede and Callisto. The Great Red Spot is larger than one Earth diameter from north to south, while Europa is about the size of Earth’s Moon. Ganymede is the largest moon in the solar system. (Courtesy of NASA and JPL.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University