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

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

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

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human ...

Hernandez runs the planetarium at UTRGV and says all the planets in our solar system will be visible tonight. Six planets will be visible to the naked eye and eight can be seen if you have a telescope ...

Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.

Up to seven planets from our solar system could be on display simultaneously, although spotting two of them might require a bit more effort. Over the next month, Mars, Venus, Jupiter, and Saturn ...

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