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

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.

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

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

NASA has been monitoring a never-before-seen planet in its solar system, which is eight times the size of Earth.

The exoplanet has a radius around 2.7 times and a mass about 8.2 times greater than Earth ... expands our understanding of the diversity of planets (just like this strange object in our Solar System).

A planet parade is when several of our solar system's planets are visible in the ... Hemisphere will be just after sunset at around 8:30 p.m. local time. You still might be able to catch Venus ...

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 ...