If you haven’t finished your holiday shopping yet, consider these 10 gifts, good any time of year! One of the hardest things when it comes to holiday shopping is to find […]

We’ve come so far since 2015; what do we know about dark matter now that we didn’t know then? Back in 2015, the dark matter situation was pretty straightforward: the large-scale […]

There are plenty of questions we don’t know the answer to. With quantum gravity, they might be solved! This article is written by Sabine Hossenfelder. Sabine is a theoretical physicist specialized […]

Don’t believe in dark matter or dark energy? Your view of the Universe just got a lot more difficult. If you ask an astrophysicist what’s the greatest puzzle in the […]

For the first time, we’ve seen neutron stars merge. At last, the gravitational and electromagnetic sky are one. “It’s becoming clear that in a sense the cosmos provides the only laboratory […]

One of cosmic inflation’s cofounders came out against it, calling it not even science. But it is… and so much more. “There’s no obvious reason to assume that the very same […]

Why the 2017 Nobel Prize isn’t the end, but the start, of something really, really big. “Wormholes are a gravitational phenomena. Or imaginary gravitational phenomena, as the case may be.” –Jonathan […]

A well-deserved award for the discovery over a century in the making. “Well, I walked into Building 20 and looked in at the various little labs. There was a bunch of […]

Three eyes are so much better than two. Here’s why. “Einstein’s gravitational theory, which is said to be the greatest single achievement of theoretical physics, resulted in beautiful relations connecting gravitational […]

For the first time, the gravitational wave sky and the astronomical sky might be coming together. It’s a new era, at long last. “Presently thought to be the most powerful explosions […]

Gravitational waves and spacetime ripples have so much more to do with the Universe than just merging black holes. “The years of searching in the dark for a truth that one […]

Did they perform their analysis sub-optimally? Maybe. But gravitational waves were seen no matter what. “We hope that interested people will repeat our calculations and will make up their own minds […]

Brown dwarfs are the ultimate failed stars, but they might not remain as failed forever. “[Brown dwarfs] appear to live a more exciting life than we presumed. They are too big […]

Meet LISA, the Laser Interferometer Space Antenna. Yes, it’s giant LIGO, in space, and it’s happening! “Einstein’s gravitational theory, which is said to be the greatest single achievement of theoretical […]

The smart money is still on LIGO, but there sure looks like something funny is happening if the new group is correct. This article was contributed by Sabine Hossenfelder. Sabine […]

Never heard of SKA, the square kilometer array? Once it starts taking data, you’ll never forget it. “Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for […]

Gravitational waves and electromagnetic ones don’t need to go together. But physics says it’s possible; what do the observations say? “The black holes collide in complete darkness. None of the […]

The 20th century held some incredible advances across all the science. But astrophysics’ best days are yet to come. “When we have found how the nucleus of atoms is built up […]

A live-blog event happened a week ago, but you can catch the entire thing anew here, right now! “We have never observed infinity in nature. Whenever you have infinities in […]

We’ve never seen an event horizon, nor directly imaged a black hole. Thanks to a worldwide effort, victory may at last be in sight. “Never look down to test the ground […]

What would energy without a particle to attach itself to even look like? “It is only through labor and painful effort, by grim energy and resolute courage, that we move on […]

It’s the most fundamental fabric of the Universe itself. But how does it work? “‘Space-time’ — that hideous hybrid whose very hyphen looks phoney.” –Vladimir Nabokov When it comes to understanding the Universe, there […]

Merging black holes are some of the most extreme events in the Universe. Could a modified event horizon reveal quantum gravity? “The bedrock nature of space and time and the unification […]

SETI is searching for the same signals humans were producing in the 1960s. Why wouldn’t aliens do better? “I know perfectly well that at this moment the whole universe is listening […]

And what are our prospects for observing its event horizon? “Never look down to test the ground before taking your next step; only he who keeps his eye fixed on the […]