The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...
Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar system was the only planetary system known to humans. We had no proof other ...
Our Solar System is simple—one star, planets orbiting around it. But what happens in a system with multiple stars? Scientists ...
Although the occurrence climaxed on Jan. 21 with a conjunction—close alignment—of Saturn and Mercury, the planetary parade ...
Star Wars is a vast and wonderful universe that continues to ... Without further ado, and in no particular order, here are ...
An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.
Conditions in the early universe might have enabled rocky planets with water to form much earlier than anticipated, potentially allowing life to begin sooner too. Astrophysicists studying the ...