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 of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far ... This allows us to compare the planets in even more detail. Mercury and Venus are both ...

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

Astronomers using the James Webb Space Telescope (JWST) have uncovered a planet so extraordinary it has defied all existing classifications. The planet, GJ 1214 b, is located a mere 48 light-years ...

On Feb. 24, from west to east, you can see Mercury, Saturn, Neptune, Venus, Uranus, Jupiter and Mars, all spanning 117.5°, ...

Emily Simpson, a passionate space enthusiast and recent Florida Tech graduate, has published groundbreaking research that imagines an alternate version of our solar system. Instead of the asteroid ...

Astronomers believe that our solar ... system’s formation, extends far beyond Neptune and is home to Pluto and other dwarf planets. Astronomers believe that Planet Nine could be 5-7 times the ...

They developed a 3D model that simulates how the solar system's orbital architecture may have evolved differently with the formation of a planet that is at least twice the size of Earth's mass—a ...