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

WASP-121b is like nothing in the solar system, raining liquid metal and being puffy like a marshmallow. The origins of these ...

Mercury joins the night sky to complete a 7-planet alignment just after sunset for the end of February. Saturn leaves our ...

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

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

An object we thought belonged to the most common category of planet in the galaxy has turned out to be something we've never seen ... because we have nothing directly analogous to them here in our ...

A shortcut for New Yorkers to spot some of the planets is to look for them when they are near the moon. On Feb. 1, Venus will ...

The finding, reported in the science journal Geochimica et Cosmochimica Acta, is significant because the data reported by the ...

In October 2020, a van-sized robotic spacecraft briefly touched down on the surface of Bennu, a 525-meter-wide asteroid 320 ...

Helium can help scientists detect the speed and direction at which we’re moving through space. Deuterium, which is left over ...