Jupiter's moon count reaches 95+ official satellites. Explore the history of the Jovian system, from Galileo to the latest NASA discoveries.

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...

On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he looked at Jupiter through his telescope, he saw what he thought were three tiny ...

Europe's space leaders were told to "speed up" security missions and launch the IRIS2 satellite constellation by 2029 at the ...

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...

Greetings everyone! We have an unusual sky event this month to start off the new year. On Thursday, 29th of January, there will be a lunar occultation of El Nath, the second brightest star in Taurus ...

The wolf moon is spectacular enough, but look east and you’ll see a celestial titan the size of a pinprick ...

Saturn reigns supreme when it comes to the number of moons orbiting any solar system planet. Including the 128 newly-discovered moons from 2025, Saturn has a whopping 274 moons. They range in size ...

The observatory, located away from city lights and above the fog line, offered a prime location to attempt to view the ...

Sky This Week is brought to you in part by Celestron. Friday, January 9Cygnus may be sinking toward the horizon a few hours ...