The Universe

Other planets have moons, too. Do they get eclipses like we do?

The moon is Earth’s constant companion. But will that always be the case?

Sometimes we mistake one kind of object with another to disastrous effect

The James Webb Space Telescope has found nearby brown dwarfs masquerading as far-distant galaxies. The discovery reinforces how, in astronomy, what you see isn’t always what you get

Meteor camera networks can reveal the hidden history of the solar system, and you can assist from your own backyard

Planets might exist in the least likely place you’d imagine—around the outskirts of supermassive black holes

Deep surveys of the sky have turned up galaxies vastly larger than our own. Are there even bigger ones yet to be seen?

Our galaxy and its nearest large companion, Andromeda, may be headed for a collision on a cosmic scale. What happens then?

There are parts of the universe, and of the electromagnetic spectrum, that we’re not covering with our telescopes—but not as many as you might think!

The problem with Pluto isn’t its planetary or nonplanetary status—it’s our insistence on declaring the world must be one or the other

The Kardashev scale is an interesting but flawed gauge of a civilization’s growth

Subatomic black holes from ancient cosmic history could, in principle, make you have a very bad day. But chances are you’ll never encounter one