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

Astronomers have uncovered new evidence that Jupiter’s moon Callisto likely harbors a massive underground ocean, potentially ...

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

Four hundred years ago, Italian astronomer Galileo Gaililei unveiled his newest innovation: a 3x telescope. This would enable him to prove a theory that would have profound impact on humanity: the Sun ...

In 1610, astronomer Galileo Galilei used the newly invented telescope to show that the Milky Way was composed of a huge number of faint stars. For the next 300 years, astronomers assumed that the ...

But across his long career, nothing beats the time he spent in a Florentine library where he handled some of the original observing notes written by Galileo Galilei, the Italian astronomer who ...