July 25 has been a date marked by remarkable events that have shaped history.One of the most profound events occurred on July ...

Two new moons have been discovered orbiting Jupiter, bringing the total number of natural satellites orbiting the gas giant ...

Jupiter's four best-known moons are the Galilean moons, discovered by Galileo Galilei in 1610. They are named Ganymede, Callisto, Io and Europa, after figures in Greek mythology associated with ...

Close-up of the craters and furrows on Ganymede's surface. Credit: NASA/JPL-Caltech/SwRI Aside from being the biggest of Jupiter's 95 moons, Ganymede is best known for its axial tilt and deep furrows.

Discovered by Galileo in 1610, Europa is one of the four so-called Galilean moons of Jupiter, along with Ganymede, Io and Callisto. Seeking conditions that support life ...

The Jovian system has greatly attracted the interest of human exploration because of the important scientific value. However, Jupiter and its 4 Galilean moons form a unique and complex multi-body ...

One of Jupiter’s 95 known moons, Europa is almost the size of our own moon. It’s encased in an ice sheet estimated to be 10 miles to 15 miles or more (15 kilometers to 24 kilometers) thick.

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

Jupiter has four major moons (Galilean satellites) that often pass between Jupiter and the Sun: in seven days, Ganymede transits once; Europa, twice; and Io, four times.

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA's ...

With a diameter of 5262 kilometers (3280 miles), Ganymede is the largest moon in the solar system. Larger than both planet Mercury and dwarf planet Pluto, it’s also the only satellite in the ...