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

"There are still many things related to planetary formation and the early evolution of young planetary systems that we don't ...

Planets around other stars need to be prepared for extreme weather conditions, according to a new study from NASA's Chandra X ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Accessible to anyone the world over, witnessing the majesty of the solar system, including the Milky Way, and its billions of stars and planets is a sight to behold. While many nights offer the chance ...

Astronomers measure a star’s brightness using the apparent magnitude system, where lower values indicate brighter stars.

The next great space telescope will study distant galaxies and faraway planets from an orbital outpost about a million miles ...

A rare celestial event is set to captivate skywatchers in January 2025, when six planets—Venus, Mars, Jupiter, Saturn, Uranus ...

Enigmatic planet Mercury posed for some closeups when the BepiColombo mission flew by. Craters, bright regions and volcanic ...

Skies over South Carolina kick off 2025 with a planet parade, ancient comet and the muse of "Beyond Antares," a 23rd-century love song from "Star Trek" fame.