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.

The second full moon of the year—arriving on February 12—takes its name from the dusting of snowfall common at this time of ...

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

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 ...

As for astrological aspects that will color this lunation, Thomas points out that the new moon in January will be exactly ...

NASA's Juno spacecraft has discovered a giant volcanic hot spot on the surface of Jupiter's hellish moon Io. The eruptions in ...

"This is the most powerful volcanic event ever recorded on the most volcanic world in our solar system — so that's really ...

NASA’s Juno mission found Io’s biggest volcanic eruption ever. The explosion was stronger than all Earth’s power plants ...

With the telescope having been recently invented, Galileo started playing around with it, making his own improvements to the new gadget ... to as the Galilean moons of Jupiter owing to the ...