From a marathon milestone on Mars to a sky filled with satellite trails above Chile’s deserts, this week’s collection ...

A predawn Moon-and-planets meetup, a returning comet, a great chance to see the Milky Way, and Saturn's rings at a new angle.

The moon and Saturn will appear very close to each other Tuesday evening. Skywatchers will be able to see this conjunction ...

The search for life beyond Earth has always been full of surprises. Strange radio signals have sparked excitement. Odd gases on distant worlds have raised questions. Even ordinary objects have been ...

New observations of WD 1856 b, a gas giant closely orbiting a white dwarf, offer a preview of what could happen to Jupiter ...

Something on Pluto and one of Saturn’s moons, Titan, absorbs light in a way unexplained by anything in spectroscopic ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of ...

A Japanese spacecraft flew by an asteroid and snapped a picture. It turned out to be a “contact binary”: two space rocks that ...

Looking for mountain getaways in New York that offer something special? These 11 mountain retreats offer peaceful escapes and ...

Our satellite stands as the apex of a triangle with two outer planets — Saturn and Neptune — in the early-morning sky.

Skywatchers are going to want to keep an eye on the sky across the U.S. on Tuesday evening. The moon and Saturn conjunction ...

The Hubble Space Telescope is an audacious expression of human curiosity. Since its launch in 1990, it has done much more than just expand humanity’s scientific reach: it has changed how people see ...