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Astronomy
From when its light was emitted, the El Gordo galaxy cluster might be the most massive object in all of existence. Here's how JWST sees it.
Each year in mid-August, Earth plows through the debris stream of an enormous comet, creating the Perseids. 2023's show will be magnificent!
Ultracold gases in the lab could help scientists better understand the universe.
Back in the 1930s, Fritz Zwicky postulated the existence of dark matter. No one took it seriously until Vera Rubin's work: 40 years later.
Can two planets stably share the same orbit? Conventional wisdom says no, but a look at Saturn's moons might tell a different story.
All stars, eventually, run out of fuel and die. Given all the stars we can see and the vast distance to them, are any of them already dead?
The hunt for the elusive particles continues.
We may be the last generation born not knowing if we are alone in the Universe.
Today, our observable Universe extends for 46 billion light-years in all directions. But early on in our history, things were much smaller.
The giant impact theory suggests our Moon was formed from proto-Earth getting a Mars-sized strike. An exoplanet system shows it's plausible.
A Harvard astronomer went to the bottom of the ocean, claiming he recovered alien technology. But what does the science actually indicate?
The space telescope's findings challenge the notion of a galaxy brimming with life.
From the present day all the way to less than 400 million years after the Big Bang, we're seeing how the Universe grew up like never before.
Get ready for the most peculiar road trip that will help you understand the vastness and emptiness of the solar system — and Sweden.
Some 55 million light-years away lies the giant galaxy Messier 87. Its supermassive black hole, inside and out, looks better than ever.
For thousands of years, we puzzled at how far away the Moon was. Today we know its distance, at any time, to within millimeters.
While Saturn and its moons all appear faint and cloudy to JWST, Saturn's rings are the star of the show. Here's the big scientific reason.
There's an entire Universe out there. So, with all that space, all those planets, and all those chances at life, why do we all live here?
In a distant galaxy, a cosmic dance between two supermassive black holes emits periodic flashes of light.
As the Earth spins and wobbles on its axis and revolves elliptically around the Sun, each day changes from the last. "24 hours" isn't right.
The farther away they get, the smaller distant galaxies look. But only up to a point, and beyond that, they appear larger again. Here’s how.
The familiar terrain of solids, liquids, and gases gives way to the exotic realms of plasmas and degenerate matter.
What do the dark recesses of the early Universe and Zelda: Tears of the Kingdom have in common? More than you could have ever hoped for.
The brightest gamma-ray burst ever observed, GRB 221009A behaved in unexpected ways that might help us understand how they occur.
Sun-like stars live for around 10 billion years, but our Universe is only 13.8 billion years old. So what's the maximum lifetime for a star?
With hundreds of billions of stars burning bright, some galaxies are already dead. Their inhabitants might not know it, but we're certain.
There are 40 billion billion black holes in the universe. Here’s how our Solar System stacks up against ten of them.
Exoplanet LP 791-18d is likely to have an atmosphere and liquid water.
Gamma-ray bursts are so powerful they could vaporize the Earth from 200 light-years away. Recreating them in the lab is not easy.