Despite its scope, this is no dry tome of purely academic interest; it is full of wonderful stories, biographical sketches and accounts ... several centuries before Galileo's telescope and ...

Jupiter's Galilean moons continue performing ... show the 10th-magnitude dot in the sparse star field. By making a sketch with three or four dots and returning on another night, you can see ...

In his brief autobiographical sketch Jefferson wrote that he deemed ... The impossibility of perpetual motion, of navigation to the moon, of the manufacture of an elixir of life, we accept as ...

Recent flybys of the fiery world refute a leading theory of its inner structure — and reveal how little is understood about ...

Historical context of GNSS in space. The latest historic chapter in GNSS for space users was launched, as one would expect, at an Institute of Navigation (ION) GNSS+ conference t ...

Io, the innermost of Jupiter’s four Galilean moons, is the most volcanic world in the solar system, giving it a dynamic mix of yellows, reds, and browns. Hyperion is one of the strangest moons ...

Initially believing they were distant stars, Galileo’s repeated observations over several nights and realized they were moons orbiting the gas giant. And thus, Io, Europa and Ganymede became ...

That's what Galileo did when he pointed his telescope at the heavens and declared that Earth wasn't the centre of the universe. The Moon wasn't a perfect celestial orb, he said, but pockmarked ...

Here’s how it works. On April 23, 1962, NASA launched the Ranger 4 mission to the moon. After the first three Ranger missions failed, NASA was really happy with the successful launch of Ranger 4.

Europa is being visited by NASA's Europa Clipper to examine its subsurface ocean while NASA's Juno continues to study Europa and the other Galilean moons. For Titan, NASA is slated to launch its ...

NASA's Galileo mission to Jupiter, focusing on the four moons that the Italian astronomer discovered 400 years ago, observed an atmosphere on Europa, ice at the poles and possibly an underground ...