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

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

Mars will rise in the eastern sky during the night, and can look a ruddy red color ... planets always do," he added. "That line is called the ecliptic, and it represents the planet of the solar ...

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