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

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

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

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

An object we thought belonged to the most common category of planet in the galaxy has turned out to be something we've never seen ... because we have nothing directly analogous to them here in our ...

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

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

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