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Astrophysics
In Einstein's relativity and the Standard Model, we only have three spatial dimensions. But there could be more, and many think there are.
One study suggested that the "Methuselah Star" is older than the Universe itself.
In just a few seconds, a gamma-ray burst blasts out the same amount of energy that the Sun will radiate throughout its entire life.
Humanity's newest, most powerful space telescope is performing even better than predicted. The reason why is unprecedented.
A conversation with an advanced alien species is likely to be simple and to take 1,000 years. It might also be dangerous.
Individual space telescopes, like Hubble and JWST, revolutionized our knowledge of the Universe. What if we had an array of them, instead?
The information we have in the Universe is finite and limited, but our curiosity and wonder is forever insatiable. And always will be.
Most globular clusters appear to form their stars all at once, but there are exceptions. JWST just observed how "second formations" happen.
Here on Earth, the Sun is our primary source of light, heat, and energy. But it also poses a grave threat to human civilization.
On Earth, microbial growth is common in lava tubes no matter the location and climate, whether it’s ice-volcano interactions in Iceland or hot, sand-floored lava tubes in Saudi Arabia.
Human beings are tiny creatures compared to the 92 billion light-year wide observable Universe. How can we comprehend such large scales?
It's a radical but plausible idea.
JWST just found its first transiting exoplanet, and it's 99% the size of Earth. But with no atmosphere seen, perhaps air is truly rare.
Red dwarf stars were supposed to be inhospitable. But TOI-700, now with at least two potentially habitable worlds, is quite the exception.
JWST has seen more distant galaxies than any other observatory, ever. But many candidates for "most distant of all" are likely impostors.
Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we're actually anything but average.
The authors call it "wildly theoretical" — but let's take a look, anyway.
Though a single measurement is not enough to definitively decide the debate, this is a major win for dark matter proponents.
Yes, dark energy is real. Yes, distant galaxies recede faster and faster as time goes on. But the expansion rate isn't accelerating at all.
In 1920, astronomers debated the nature of the Universe. The results were meaningless until years later, when the key evidence arrived.
Quantum mechanics has taught us that even empty space contains energy. "Negative energy" is the state of having less energy than empty space.
As time goes on, dark energy makes distant galaxies recede from us ever faster in our expanding Universe. But nothing truly disappears.
2023 will see the launch of new rockets, the return of OSIRIS-REx, and a mission to Jupiter that could help us find extraterrestrial life.
In the grand scheme of the cosmic story, a single year isn't all that significant. But over time, the annual changes really add up!
Since dark matter eludes detection, the mission will target sources of light that are sensitive to it.
Ever since the Big Bang, cataclysmic events have released enormous amounts of energy. Here's the greatest one ever witnessed.
These were the stories you clicked on the most.
All the things that surround and compose us didn't always exist. But describing their origin depends on what 'nothing' means.