Skywatchers will witness a rare event as the Moon, Mars, and Mercury appear close together in the twilight sky this October.

The 6%-lit waxing crescent moon will be visible roughly 5 degrees above the horizon as the sun sets on Oct. 23, with Mercury ...

NASA has confirmed that interstellar comet 3I/ATLAS safely passed Earth without any deviation from its predicted trajectory, ...

SAN FRANCISCO -- Venus and Mars, planet Earth's two closest neighbors, have been inching ever closer to each other during the month of July. Monday night, they promise to put on a show, appearing at ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

Stargazers have had a lot to smile about over the past few weeks. Only a few days ago, five planets aligned in the pre-dawn sky. With the summer solstice on the horizon, a pair of planets will line up ...

The first dual-satellite mission to another planet, NASA's ESCAPADE (Escape and Plasma Acceleration and Dynamics Explorers), ...