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 ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

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

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

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 ...

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

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

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

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds ...