Europa was one of four moons discovered on Jan. 7, 1610, by astronomer Galileo Galilei. Speaking of Galileo, this photo was ...

Ganymede is an enormous moon, larger than any other we’ve found, including our own, and may one day be the centerpiece of ...

Galileo’s repeated observations over several nights and realized they were moons orbiting the gas giant. And thus, Io, Europa and Ganymede became known as the Galilean moons of Jupiter.

NASA's Juno spacecraft has again captured stunning images of Jupiter and its moon Io, providing more insights into the solar ...

The Red Planet comes closest to Earth, disappears behind the Moon in an occultation, and finally reaches opposition in the ...

Throughout their orbit, the Ganymede transits once, Europa transits twice, and IO transits up to four times, all in the span of seven days. Since these moons orbit close to Jupiter’s own orbital ...

Galileo Galilei's telescopic discovery of Jupiter's four moons in 1610 revolutionized astronomy and supported heliocentric ...

Research and development is underway to create robots that can hunt for signs of life in the vast oceans that exist under the ...

Jupiter's moons Europa and Ganymede, as well as Saturn's moon Enceladus, are considered prime candidates. The surfaces of these moons are covered with thick ice layers, and below them, ocean water ...

There are currently 92 moons known to orbit Jupiter. The four largest – Io, Europa, Ganymede and Callisto – were discovered by Galileo Galilei in 1610 when he pointed the first astronomical telescope ...