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.

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

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event ...

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

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

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

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

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 ...

Stargazers, prepare for the parade of planets that will take place over the next few nights in the sky. Here's what you need ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...