How do we know what the insides of Venus or Jupiter look like? The short answer is that we don't. The longer answer is that we make a fairly accurately guess.

Black holes aren't just the densest, most massive objects in space. They might also be some of the fastest.

A new mission to Mercury will test a quirk of general relativity. It won't be decisive and will involve a lot of precision measurement and tedious number-crunching. And it's exactly the kind of science we should be encouraging.

Nuclear pasta isn't exactly an awe-inspiring name, but it may be the strongest substance in the universe and it's found in only in the crust of neutron stars.

Despite their fearsome reputation, we simply wouldn't exist without black holes.

A new paper claims that the universe's expansion isn't accelerating. If that's true, we have to start rewriting cosmology as we know it.

Oddly, this is a case when a few signals would make a better case for alien contact than hundreds.

Fast radio bursts get even more mysterious with new detections and point to a new culprit: magnetically supercharged neutron stars.

Early galaxies seem to grow a lot faster than they should. We finally know how.

Let's say the worst happened and you've been sucked into a black hole as your body was torn apart. So, what happens to you next?

No, fast radio bursts, or FRBs, aren't microwave noodles of impatient astronomers. They're a very real phenomenon the media just can't seem to get right.

If you've heard about the Cold Spot, you may have read that it's caused by a strangely low density of galaxies in that area of the universe. But the truth is much, much weirder...

The bizarre, extremely fast radio bursts astronomers have been detecting might be the result of doomed neutron stars...

Tracking the speed of an event horizon can tell us what a black hole ate, give us a clue as to how it was formed, and whether it survived a major collision.

On the largest cosmological scale, the universe is supposed to be homogenous. A new discovery puts that principle in question.