Skywatchers on Thursday evening, Feb. 6, will notice an eye-catching pairing-off between two of the brightest objects in the ...

Using his celestial observations, including the discovery of Jupiter’s satellites, Galileo came up with a book titled Siderius Nuncius (The Starry Messenger) in March 1610. In this work ...

Saturn, Jupiter’s outer neighbour, currently has 83 known satellites. The four larger moons mentioned ... Images acquired during the Galileo mission revealed that the moon is very irregularly shaped ...

In January 1610, astronomer Galileo Galilei spotted what he thought were four small stars tagging along with Jupiter. These pinpricks of light are actually Jupiter's four largest moons ...

NASA officials said what Juno spotted was 'the most powerful volcanic event ever recorded on the most volcanic world in our ...

On this date, Jan. 17, 2002, the Galileo probe made it’s 33 rd pass of Jupiter’s moon, Io. After Voyager 1’s pass in 1979, Io was dubbed the most volcanically active place in the solar system.

Among them was the discovery of four moons orbiting Jupiter. To Galileo, the moons proved that not everything in space circled the Earth, and therefore our planet was not the absolute center of ...

Io is the third-largest natural satellite of Jupiter. Its thin atmosphere consists ... While Io was discovered by Galileo in 1610, its volcanic activity was identified nearly 400 years later.