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

And its relationship to Pluto — a world demoted since 2006 from the solar system’s ninth planet to a lowly dwarf planet ... anything moving slower than 1.5 arcseconds per hour.

Uranus has the craziest tilt in your Solar System. Its tilt is about ninety-eight degrees. That means its north pole is ...

Timing: Dusk after sunset, but before 9 p.m. local time There are eight planets in our solar system and one dwarf planet (Pluto ... mag -2.6 Uranus: mag 5.7 (need telescope most likely) Neptune: mag 7 ...

Timing: Dusk after sunset, but before 9 p.m. local time There are eight planets in our solar system and one dwarf planet (Pluto ... mag -2.6 Uranus: mag 5.7 (need telescope most likely) Neptune ...

Charon is unusual because it is the largest moon in the solar system compared with its parent body. In fact, Charon and Pluto are so similar in size that they are considered a double dwarf planet ...

Charon is large in size relative to Pluto, and is locked in a tight orbit with the dwarf planet. A new simulation suggests how it ended up there. By Jonathan O’Callaghan Some 4.5 billion years ...

A Milky Way-surveying spacecraft found a planet 12 times more massive than Jupiter, along with a brown dwarf, each distantly orbiting stars smaller than the sun. Scientists have dubbed the exoplanet, ...

For some bodies, like all of the planets of the solar system, the difference ... perihelion and aphelion is 0.5 AU, according to the Royal Greenwich Observatory. Dwarf planet Pluto, on the other ...

Carbon-rich cosmic dust comes from different sources and spreads out into space, where it's necessary for life and for the formation of rocky planets like ours ... it is in clouds larger than our ...

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