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

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

Traveling from one star to another is currently impossible to achieve within a human lifetime. But some projects are ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

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

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.

Scientists found an intriguing world in our galaxy.

While claims of a “rare alignment” are overblown, you can still see up to six planets in the night sky this weekend. Here's ...