67 moons orbit the great gas giant Jupiter; of these, the four largest are known as the Galilean moons, having been discovered by Galileo Galilei using his telescope in 1610. The four moons are Io ...

And today, we know so much about each Galilean moon that they are almost considered planets in their own right. This mosaic shows the surfaces of Jupiter’s four Galilean moons images ...

The Moon passes 5° north of Jupiter at 9 A.M. EDT. Just six percent illuminated by this evening, you can try to spot the ...

These four satellites are known as the Galilean moons, as they were discovered by the famous astronomer Galileo Galilei in 1610. It was the first time a body was observed orbiting around something ...

As the most massive planet in the Solar System, and first to form, Jupiter’s gravity shaped the formation of everything else.

Even in a backyard telescope, the four largest moons of Jupiter are big enough to be seen as little specks of light. And while humans have known about these “Galilean satellites” for centuries ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. On the evening of Jan. 7, 1610, Galileo Galilei turned his newly constructed telescope on ...

Once you get out to Ganymede, many people stop caring. Io and Europa have stolen the spotlight, leaving the last two Galilean moons as a fleeting thought, if even that. A cut-out of Ganymede.

On Aug. 15, Jupiter’s largest moons, known as the Galilean moons, aligned to give two stunning, rare astronomical events. First, Earthlings could see three of Jupiter’s Galilean moons ...

But Galileo persisted, and figured it out. We call these four the Galilean moons in his honor: Io, Europa, Ganymede, and Callisto. Here’s how we see them today: The image above [click to ...

Saturn may have played a key role in the birth of Jupiter's largest moons, a new study finds. Fox News Media Fox News Media Fox Business Fox Nation Fox News Audio Fox Weather Outkick Books Fox ...

Io, Callisto, Europa, and Ganymede are the four Galilean moons (pictured here in that order). They are some of the most well-known moons in the solar system, mainly because they are the most ...