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Astrophysics
Nearly half of all stars are born in binary systems, with the most massive ones dying the fastest. It's not pretty for the "second" star.
Freethink's weekly countdown of the biggest space news, featuring Starship's second test flight, a new "dark mysteries" telescope, and more.
The Big Bang theory is not threatened, but astrophysicists have some explaining to do.
The paper does not prove the existence of dark matter, but it mostly eliminates a rival theory called Modified Newtonian Dynamics.
In the early stages of the hot Big Bang, there were only free protons and neutrons: no atomic nuclei. How did the first elements form from them?
Our intuitive understanding of time is very different from a physicist's understanding of time. How do we reconcile these views?
In the early stages of the hot Big Bang, matter and antimatter were (almost) balanced. After a brief while, matter won out. Here's how.
In 2022, Hubble owned the record for most distant galaxy. Today, that galaxy is down to the 9th most distant object. Thanks, JWST.
For a substantial fraction of a second after the Big Bang, there was only a quark-gluon plasma. Here's how protons and neutrons arose.
In the earliest stages of the hot Big Bang, equal amounts of matter and antimatter should have existed. Why aren't they equal today?
When the hot Big Bang first occurred, the Universe reached a maximum temperature never recreated since. What was it like back then?
Some 13.8 billion years ago, the Universe became hot, dense, and filled with high-energy quanta all at once. Here's what it was like.
Two of the answers add a dimension to physics that doesn’t belong there. Maybe we could call it "astrotheology."
With LEDs bringing brighter nighttime lighting than ever before, and thousands of new satellites polluting the skies, astronomy needs help.
Bang bang all over the Universe.
Finding alien technology on the seafloor would be truly incredible. This extraordinary claim, however, is debunked by the actual evidence.
38mins
Our host Kmele went inside Fermilab, America’s premiere particle accelerator facility, to find out how the smallest particles in the universe can teach us about its biggest mysteries.
In 1667, a core-collapse supernova happened right here in the Milky Way, invisible to all humans. ~350 years later, here's what JWST sees.
When we look at our Sun, its properties are incredibly constant, varying by merely ~0.1% over time. But all stars don't play by those rules.
Light can be turned into heat, which can then be turned into motion, and the effect of that motion can be turned into a big squeeze.
All matter particles can act as waves, and massless light waves show particle-like behavior. Can gravitational waves also be particle-like?
We need a hypothesis that accounts for both the fine-tuning of physics for life but also the arbitrariness and gratuitous suffering we find in the world.
With JWST, Chandra, and gravitational lensing combined, evidence has emerged for the earliest black hole ever. And wow, is it a surprise!
What do ghosts and anomalous galaxy rotation rates have in common? Some sci-fi enthusiasts believe the answer involves "parallel universes."
Sometimes, going "deeper" doesn't reveal the answers you seek. By viewing more Universe with better precision, ESA's Euclid mission shines.
The TRAPPIST-1 system is a treasure trove of possibilities and questions. Observations by JWST have just begun.
If the Universe is expanding, and the expansion is accelerating, what does that tell us about the cause of the expanding Universe?
Everything we observe beyond our Local Group is speeding away from us, omnidirectionally. If the Universe is expanding, where is the center?
In 1054, a core-collapse supernova occurred 6500 light-years away. In 2023, JWST imaged the remnant, and might solve a massive mystery.
Out of the four rocky planets in our Solar System, only Earth presently has plate tectonics. But billions of years ago, Venus had them, too.