In January 1610, Galileo Galilei, using a newly improved telescope with 20x magnification, observed four celestial bodies orbiting Jupiter, initially appearing as stars. These bodies, later named Io, ...

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

On Jan. 7, 1610, Galileo discovered four moons revolving around Jupiter — a discovery that would change his life forever. These four moons are Jupiter’s largest satellites — lo, Europa, Ganymede and ...

Some celestial events are worth getting up early for - or perhaps staying up late for. Early risers and/or night owls on Flag Day (Wednesday) morning, given fair weather and clear skies, will be ...

Most of us know four moons of Jupiter, called the Galilean moons because they were first discovered by Galileo in 1610. Named for figures closely associated with Jupiter from Greek mythology, Io, ...

The NASA/ESA/CSA James Webb Space Telescope has provided the first direct measurements of the chemical and physical ...