You might want to keep your eyes on the skies through next month: Six planets will align in January and February.

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

When looking at our solar system, the planets going around the sun seem to be set up in a pretty organized fashion. They are ...

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.

These rocky bits eventually coalesced to form the terrestrial planets. However, at a distance of around 4 astronomical units from the Sun (AU; 1 AU is the average ... in the outer solar system. This ...

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in February.

The planets will appear to line up — but no more than usual. The planets in our solar system orbit the sun in more or less ... and Saturn appear to close the distance between them in the night ...

These planets can be seen with the naked eye, shining brighter than any other stars in the night sky. Uranus and Neptune, due to their distance and ... disk and orbit the Sun in a plane called ...

These rocky bits eventually coalesced to form the terrestrial planets. However, at a distance of around 4 astronomical units from the Sun (AU ... This first-order model of planetary growth ...