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

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade". Throughout much of January and February, Venus, Mars, Jupiter, Saturn, ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The eight planets in our solar system orbit the sun in roughly the same plane, because they all originally formed from the same disc of debris around the sun. The line the sun traces across the ...

February will be an awe-inspiring month for astronomy enthusiasts who will be able to the see the solar system's planets ...

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.

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