Called 3I/ATLAS, the comet is only the third of its kind known to astronomers, and it’s likely been heading our way for billions of years, carrying pristine material from another star system ...

A piece of the dawn: Asteroid sample science hints at an ancient salt lake and conditions in the early solar system Michelle Thompson, a Purdue planetary scientist and expert in space weathering, was ...

Aliens may have been closer to Earth than first thought. New research from NASA reveals that Ceres, the dwarf planet in the ...

STARRS Observatory in Hawaii made history in 2017 when they detected 'Oumuamua, the first interstellar object (ISO) ever ...

This new dwarf planet may exist at the edge of the solar system, possibly disproving Planet Nine's existence. This is the story of that newly encountered planet.

The triple star system is sending comets, asteroids and meteors our way, and the number of interstellar objects entering the solar system will rise.

Mark Garlick/Science Photo Library/Getty Images There’s a giant ball of ice barreling through the solar system right now, and it’s bigger than any we’ve seen before.

Asteroid-mass primordial black holes might whiz through the inner solar system just once a decade. Luckily, scientists have decades of data on satellites’ trajectories.

A lunar crater immortalized in one of the most famous photographs ever taken has just played a key role in the hunt for alien life in our solar system. Stretching nearly ... with extraterrestrial ...

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It was first discovered zipping near the sun this fall.