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 ...

Galileo Galilei's 1610 telescopic observations of Saturn initially revealed features interpreted as two appended moons or lobes. Subsequent observations in 1612 showed the disappearance of these ...

Europe’s new age of satellite navigation has passed a historic milestone – the very first determination of a ground location using the four Galileo satellites currently in orbit together with their ...

GOOD stories are apt to survive by their very fitness. In old age they may lose their savour because they are deemed legendary, but it is not well to part too lightly with old friends. The three best ...

In Astronomy's 2022 list of the 20 greatest astronomers of all time, Associate Editor Michael Bakich ranked Tycho Brahe No. 2 ...