The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, ...

When we look for extraterrestrials, we often peer into the depths of space. But alien life might be closer than you think ...

This week was monumental for NASA’s Polarimeter to Unify the Corona and Heliosphere, or PUNCH mission. The four small satellites sent to low Earth orbit opened their eyes metaphorically for the first ...

How can astronomers pierce through the interstellar fog of the Milky Way—not to study distant objects, but to understand the ...

Astronomers have confirmed that interstellar objects—cosmic bodies originating from other stars—are passing through our solar ...

There is a large diversity in the chemical composition of astronomical objects such as planets, comets, circumstellar ...

In late 2017, a mysterious object tore through our solar system at breakneck speed. Astronomers scrambled to observe the fast ...

A group of comets with unexplained movements presents a quandary D avide Farnocchia hunts down and tracks asteroids, and ...

A novel way to find aliens might be through gravitational wave detection, Loeb says. He is interested in laser interferometry ...

The asteroid that once had a small chance of striking Earth and now might slam into the moon resembles a spinning hockey puck ...