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 ... onto a different course. A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the ...

Does our Solar System have 9 planets or only 8? Astronomers have gone back and forth on that a lot, with Pluto now being classified as a dwarf planet. However, out beyond Neptune there could be ...

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

Planet ‘parades’ are not uncommon. While occasionally spotting 4-5 planets is not unusual, sighting the alignment of all 7 ...

Mars, our neighboring red planet, possesses some of the most dazzling and extreme geological features within our solar system ...

possibly eight times the mass of Jupiter, may have significantly altered the orbits of the four outer planets in our solar system. This encounter, occurring billions of years ago, could explain ...

Jupiter, the largest planet in our solar system, is a gas giant known for its swirling storms, iconic Great Red Spot, strong ...

For the first time, astronomers have imaged dozens of belts around nearby stars where comets and tiny pebbles within them are ...

Despite common assumptions, the disk of our Solar System is warped, and the planets travel around the Sun in slightly eccentric (or oblong) orbits. Scientists now think that a mysterious object ...

While the planets won’t be perfectly aligned, their placement will follow the orbital plane of our solar system. Which planets are parading in January and February? The January planetary ...