There's a new race in space, but it's not where you might think. It's happening close to home – in the nearest bit of space, ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Spotting one or two of the planets in our solar system is well worth a good skywatch, but seeing (almost) all of them in a ...

By tracing the corkscrew wobble of two stars as they move through the sky, the Gaia space mission has discovered one new ...

NASA and European scientists explain how they calculate the probability of the space rock 2024 YR4 impacting our planet, and why it’s not yet time to worry.

Or, for those who remember vinyl records, think of the grooves around the central hub as the planets' orbits. Earth’s orbit lies in that same plane, so from our perspective, we cannot see the ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Scientists found an intriguing world in our galaxy.