SpaceX and other companies plan to launch tens of thousands of satellites, which could mar astronomical observations and pollute the atmosphere.

Satellites connect people around the world but they also interfere with astronomers’ views of the cosmos. There are ways to reduce these tensions.

The sheer number of objects suggests scientists will soon have to grapple with what counts as a moon versus what’s just a ...

This multitude of small, not very round objects are thought to be fragments of larger moons that broke apart in collisions ...

Even before the recently announced moons, Saturn had more than anyone could reasonably keep track of. Now, astronomers have ...

The number of known moons in our Solar System has been rising for centuries, but astronomers say it has probably peaked – for ...

The smashups are thought to have occurred at least 100 million years ago, but the moons they created are new to astronomers.

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...

That’s because on Tuesday, the International Astronomical Union (IAU) recognized 128 new moons in orbit around Saturn, discovered by astronomers from Taiwan, Canada, the United States and France.

Names of astronomical objects are governed by the International Astronomical Union (IAU). Originally, all moons in the Solar System were given names from Greco-Roman mythology. But the large ...