And yet, this was the case with Galileo’s discovery of Jovian satellites, which took shape from January 7, 1610. Astronomical changes were brewing at the end of 1609. With the telescope having ...

Jupiter and its four planet-size moons, called the Galilean satellites, were photographed by Voyager 1 and assembled into this collage. They are not to scale but are in their relative positions.

The eruption released energy six times greater than all Earth's power plants combined, exceeding 80,000 trillion watts.

Four days later, he observed a fourth point of light near the planet with the same unusual behavior. By Jan. 15, Galileo correctly concluded that he had discovered four moons orbiting around Jupiter, ...

During last week’s 17th European Space Conference, launch company Arianespace announced it had won three new contracts.

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 ...

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 ...

A new family of active, multi-band global navigation satellite system (GNSS) antennas is now available from Taoglas: Levity series’ AHP24510 (L1/L2/L-Band) and AHP54510 (L1/L5/L-Band) directional ...

If we're being frank, which is how we roll in the Rocket Report, some of Orbex's recent activity does not inspire confidence.

I work construction and am very very hard on wristwatches,” wrote one reviewer. “This watch is worth every penny.” ...