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

Watch this video to find out more about the Earth, planets in our Solar System and other planets far ... On a clear night from Earth we can sometimes see the five planets which are closest to ...

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

The Solar System doesn't get ... since their formation some 4.5 billion years ago. Using the JWST, astronomers took spectroscopic observations of both dwarf planets in reflected sunlight.

It stands as one of the five officially recognized dwarf planets in our solar system, alongside Pluto, Haumea, Makemake, and Eris. These celestial bodies share common features like being spherical ...

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

Opinions expressed by Forbes Contributors are their own. Jamie Carter is an award-winning reporter who covers the night sky. Computer simulations suggest that there is an undiscovered Earth-like ...

If you get the question in Trivial Pursuit “how many plantes are there in the Solar System ... Pluto was downgraded from a “planet” to a “dwarf planet” in 2016 by the International ...

NASA artist’s conception of a brown dwarf (main) and stock image of the planets in the solar system (inset). An object between 2 and 50 times the mass of Jupiter may have flown through our ...