Mercury is the speed champion in our Solar System. It orbits the Sun every 88 days, and its average speed…
If we had to rely solely on spacecraft to learn about the outer planets, we wouldn't be making great progress.…
Consumption and disintegration. Next time you want to be the life of the party—if you're hanging out with cool nerds…
If a solar system is a family, then some planets leave home early. Whether they want to or not. Once…
Everything in space is moving. Galaxies collide and merge, massive clouds of gas migrate, and asteroids, comets, and rogue planets…
Scientists have learned a lot about the atmospheres on various worlds in our Solar System simply from planetary sunrises or…
Whatever we grow up with, we think of as normal. Our single solitary yellow star seems normal to us, with…
Astronomers like observing distant young stars as they form. Stars are born out of a molecular cloud, and once enough…
Today we push our aging curiosity out into the Solar System to ask that simple question: how old is it…
Why are the planets round? For that matter, why are all the big objects in the Universe this shape? The…