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

Mercury takes only 88 Earth days to orbit the sun.

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

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

Mercury joins the night sky to complete a seven-planet alignment just after sunset for the end of February. Saturn leaves our ...

A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after dusk, according to ...

Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

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

you’re peering into the vast expanse of our solar system. Each planet orbits the Sun at vastly different distances—Mercury sits about 36 million miles, while Neptune is at a stately 2.8 ...