For centuries, Jupiter reigned as king of the moons. Initially, the Big Four, discovered by Galileo, and then as optics and ...

Once its rings vanish from sight in March 2025, Saturn will look like a pale yellow sphere through most telescopes.

ON a memorable evening in the year 1610 Galileo sat in the tower of his observatory in Florence, and gazed through his newly-invented “perspective glass” at Saturn, which was then regarded as ...

Four of our planets have rings, but Saturn's are enormous and complex, in a class of their own. Just after the turn of the 17th century, Galileo Galilei designed and built the first telescope ...