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Astrophysics
Two fundamentally different ways of measuring the expanding Universe disagree. What's the root cause of this Hubble tension?
The Schumann resonances are the background hum of the entire planet. But they don't affect humans in any way.
As Marcel Proust said, “The real voyage of discovery... consists not in seeking new landscapes, but in having new eyes.”
The visible Universe extends 46.1 billion light-years from us, while we've probed scales down to as small as ~10^-19 meters.
How scientists are hearing the gravitational background "hum" of the Universe for the very first time.
Einstein's laws of gravity have been challenged many times, but have always emerged victorious. Could wide binary stars change all that?
Each of our three nearest stars might have an Earth-like planet in orbit around it. Here's what we'll learn when we finally observe it.
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!
Even with the quantum rules governing the Universe, there are limits to what matter can withstand. Beyond that, black holes are unavoidable.
There are two types of missing, or "dark" matter: baryonic (made of normal matter) and non-baryonic. Have we finally found the normal stuff?
Nothing can escape from a black hole. So where do Hawking radiation, relativistic jets, and X-ray emissions around black holes come from?
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?
Over 50 years since humans last walked on the Moon, astronaut footprints and rover tracks are still visible. But they won't last forever.
Today, our observable Universe extends for 46 billion light-years in all directions. But early on in our history, things were much smaller.
The concept of the warp drive is currently at odds with everything we know to be true about physics.
The giant impact theory suggests our Moon was formed from proto-Earth getting a Mars-sized strike. An exoplanet system shows it's plausible.
For many years, cosmologists have claimed the Universe is 13.8 billion years old. A new paper says no, it's 26.7 billion. How do we decide?
If you've found yourself befuddled by extraordinary scientific-sounding claims, you're not alone. But this centuries-old lesson can help.
What are supermassive black holes, how common are they, and how do they grow up throughout cosmic history? Listen and find out!
The separation of pleasure from procreation may occur throughout the cosmos, providing an explanation for the Fermi Paradox.
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.