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

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

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

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

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

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

Starting at 12:30 p.m. ET (1730 GMT) on Saturday (Jan. 25), astrophysicist Gianluca Masi of the Virtual Telescope Project ...

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 ...

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 ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...