An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

NEW YORK — Six planets grace the sky this month in what's known as a planetary parade, and most can be seen with the naked eye. These planetary hangouts happen when several planets appear to ...

A great planetary alignment that's coming sometime this month — there are a few different dates being thrown around. Rumor has it that as many as six planets will be in a line and visible in the ...

A parade of planets will be visible to skywatchers around the globe through the rest of this month and into February. At least four planets — Venus, Jupiter, Mars and Saturn — should be ...

INDIANA, USA — Look up in mid-January just after sunset and you'll see a six-planet alignment: Four with your naked ... (Note: The objects on the magnitude scale show what we can see at different ...