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Universe Expansion
Finding out how the Universe grew up was the biggest science goal of JWST. This ultra-early proto-galaxy cluster is one amazing discovery.
From quarks and gluons to giant galaxy clusters, everything that exists in our Universe is determined by what is (and isn't) bound together.
The LHC has a long, productive life ahead of it. An upgraded version, called the “High Luminosity LHC,” will be available in 2028.
JWST has brought us more distant views of the early Universe than ever before. Is the Big Bang, and all of modern cosmology, in trouble?
Cosmologists are largely still in the dark about the forces that drive the Universe.
What would become the Big Bang model started from a crucial idea: that the young Universe was denser and hotter.
With infrared capabilities and image sharpness far beyond Hubble's limits, JWST looked at Hubble's deepest field, revealing so much more.
It may be time for a cosmological paradigm shift.
For many years, some cosmologists embraced the idea of an eternal, steady state universe. But science triumphed over philosophical prejudice.
With a massive, charged nucleus orbited by tiny electrons, atoms are such simple objects. Miraculously, they make up everything we know.
Stars orbiting black holes were observed to move significantly slower than expected. One explanation centers on dark matter.
Voyager 2 flew past Uranus in 1986, finding a bland, featureless world. Now, in 2023, JWST's sights are similar. There's a reason for that.
When white dwarfs explode, they create a type Ia supernovae. After decades of following the leading theory, here's the complete overhaul!
Einstein called his idea "abominable," but the world of physics came around to embracing the views of Georges Lemaître.
Leading a scientific revolution is easy: you just have to succeed where the current theory fails while equaling its successes. Good luck!
Finding this missing piece of water’s path through the universe offers clues to how it came to be on Earth.
Our huge, expanding Universe may truly be infinite. But if the set of possible quantum outcomes is also infinite, which "infinity" wins?
The multiverse is an idea that has gained a lot of traction in popular culture. But what does science have to say about it?
With a finite 13.8 billion years having passed since the Big Bang, there's an edge to what we can see: the cosmic horizon. What's it like?
If the evolution of the Universe is a movie, what happens when we rewind it all the way backward?
Gamma-ray bursts are among the most energetic cosmic events of all. On October 9, 2022, a remarkable one occurred: the brightest ever seen.
Time gets a little strange as you approach the speed of light.
That scary swirling void from which nothing can escape is our perfect universal translation tool.
Many galaxies really are ultra-distant, but some are just intrinsically red or dusty. Only with spectroscopy can JWST tell which is which.
We are about to learn a lot more about the most elusive of cosmic particles.
With a bigger, better, and more sensitive detector, the XENON collaboration joins LZ and PANDA-X in constraining WIMP dark matter.
Theory without experiment is blind, and experiment without theory is lame.
What do we mean by a black hole's size? A photon sphere? The minimal stable orbit? The event horizon? The singularity? Which one is right?
Speeding through the Universe and leaving a wake of new stars, this runaway supermassive black hole is likely the first among thousands.
This beautiful JWST image of Wolf-Rayet star WR 124 has been called a "prelude to a supernova" by NASA. That might be entirely wrong.