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

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

Samples from asteroid Bennu have delivered insights into the origins of Earth’s water and the organic molecules that may have ...

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that ...

LOS ANGELES -- Studies of the samples from asteroid Bennu brought back to Earth by NASA's spacecraft have revealed that the ...

Scientists have detected organic compounds and minerals necessary for life in the samples collected by the OSIRIS-REx mission ...

A new study suggests that a planet-sized object may have passed through the solar system billions of years ago.