The fate of a comet that was predicted to pass close to Earth remains a mystery five years after its dramatic breakup in the ...

NASA scientists have recently made a groundbreaking discovery about potential alien life within our own solar system, a finding that could have significant implications for our understanding of ...

Scientists have proposed a daring mission to intercept interstellar comet 3I/ATLAS, the third such object ever detected in our solar system. But there's one problem: the interstellar comet is moving ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course. When ...

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, scientists say.

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

Our solar system is a smashing success. A new study suggests that from its earliest period — even before the last of its nebular gas had been consumed — Earth’s solar system and its planets looked ...