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 ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

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

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 ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

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

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

In the early evening, look to the southwest and you'll see Venus (the brightest object in the sky after the Sun and Moon) and ...