The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

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

ANOTHER, even rarer, ‘planet parade’ is set to grace skies very soon. For one night only, all seven other planets in the ...

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

Pete Hegseth's nomination to lead the Pentagon clears a key hurdle in the Senate Scale AI CEO Alexandr Wang on U.S.-China AI ...

Jupiter's Great Red Spot storm, which usually appears dark-red, can be seen shining a lurid blue color in an ultraviolet ...

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

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...

Emily Simpson has loved space since she was a 10-year-old kid celebrating her birthday at a planetarium. Now a recent Florida ...