Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

From a bar in the clouds to finding more water from the Moon, outer space is constantly surprising us. A vast universe Think back to what you learned about astronomy in elementary school. If you ...

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and meteoroids. The exact boundaries of the solar system ar ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

In this artist’s impression, a comet erupts with jets of gas as it falls toward the sun from the depths of the outer solar system.

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...

Lunar and solar eclipses occur when the Earth, Moon, and Sun align in specific ways, but their formations and appearances ...

Watch interstellar comet 3I/ATLAS live online tonight as it races toward the sun on a rare visit from beyond our solar system.

NASA has discovered 3I/ATLAS, only the third known interstellar object, now passing through our solar system from the direction of Sagittarius ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show.

CAPE CANAVERAL, Fla. (AP) — Astronomers are monitoring an object headed our way that may have wandered over from another star system.

Slotkin on Democratic divisions: 'We're like a solar system with no sun' The first-term senator said internal disagreements are splitting the party.