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Cosmic Inflation
Every time our Universe cools below a critical threshold, we fall out of equilibrium. That's the best thing that ever happened to us.
The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?
At 1,600 light years away, the black hole is practically in our cosmic backyard.
Are you unhappy with how various events in your life turned out? Perhaps, in a parallel Universe, things worked out very differently.
The Universe begins with negligible amounts of angular momentum, which is always conserved. So why do planets, stars, and galaxies all spin?
From the tiniest subatomic scales to the grandest cosmic ones, solving any of these puzzles could unlock our understanding of the Universe.
From black holes to dark energy to chances for life in the Universe, our cosmic journey to understand it all is just getting started.
No. No no no. Just... no. The JWST has truly blown our scientific minds, but it's a pure crackpot idea that the Big Bang is now disproven.
Magnetic monopoles began as a mere theoretical curiosity. They might hold the key to understanding so much more.
The anthropic principle has fascinating scientific uses, where the simple fact of our existence holds deep physical lessons. Don't abuse it!
The false assumption the Multiverse relies on is that something which exists requires an explanation.
There's an extremely good chance that there is, or at least was, life on Mars. But is it native to Mars, or did it originate from Earth?
We only detected our very first gravitational wave in 2015. Over the next two decades, we'll have thousands more.
Astronomy's roots rest in the very origins of humanity. We have always looked to the skies for answers. We are starting to get them.
With its very first deep-field view of the Universe now released, the James Webb Space Telescope has shown us our cosmos as never before.
When stars form, they emit energetic radiation that boils gas away. But it can't stop gravitational collapse from making even newer stars.
If you think you know how an astronomical nova works, buckle up. You're in for a ride like you never expected.
There is nothing more important to science than its ability to prove ideas wrong.
Single objects rarely change the course of an entire scientific field. Distant object GNz7q, a galaxy-quasar hybrid, might do exactly that.
As far as we can tell, there's no limit to how far it goes on; only a limit to how far we can see. Could the Universe truly be infinite?
The Hubble Space Telescope, 32 years after its launch, broke the all-time record for most distant star. It won't do better.
From the tablets of the Babylonians to the telescopes of modern science, humans have always looked to the skies for fundamental answers.
To answer any physical question, you must ask the Universe itself. But what happens when the answers aren't around anymore?
Even a tiny sliver of the Universe can reveal the cosmic story of what's out there and how it came to be the way it is today.
The closest star system to Earth, just over 4 light-years away, has three stars and at least one Earth-sized planet. Is it time to go there?
The James Webb Space Telescope could help scientists learn about the cosmic dark ages and how they ended.
When we look out at the Universe, even with Hubble, we're only seeing the closest, biggest, brightest galaxies. Here's where the rest are.
Is the multiverse real? It's one of the hottest questions in all of theoretical physics. We invited two astrophysicists to join the debate.
There are ~400 billion stars in the Milky Way, and ~2 trillion galaxies in the visible Universe. But what if we aren't typical?
The Universe is supposed to be the same everywhere and in all directions. So what's that giant "cold spot" doing out there?