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

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

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

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

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Scientists found an intriguing world in our galaxy.

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

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

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

The eight planets in our solar system orbit the sun in roughly the same plane, because they all originally formed from the same disc of debris around the sun. The line the sun traces across the ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

An asteroid that orbited near Earth for a few months as a mini-moon may be a chunk of the moon that was blasted off by an impact thousands of years ago.