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Rituals come as much from religion as they do from the way Earth spins around the Sun.

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.

Space weather poses a tremendous threat to all satellites, knocking all computer systems offline. Is that a recipe for Kessler syndrome?

The next solar eclipse to occur over heavily populated areas is on April 8, 2024. For a spectacular show; here's where the best views are!

A Carrington-magnitude event would kill millions, and cause trillions of dollars in damage. Sadly, it isn't even the worst-case scenario.

This oddball system of three stars might be our best chance at finding nearby life in the Universe.

Black holes aren't just the densest masses in the Universe, but they also spin the fastest of all massive objects. Here's why it must be so.

Thanks to observations of gravitational waves, scientists were able to settle a longstanding debate over the speed of gravity.

The Big Bang theory is not threatened, but astrophysicists have some explaining to do.

Please stop calling our Sun an "average star." It is philosophically dubious and astronomically incorrect.

The stars circle each other every 51 minutes, confirming a decades-old prediction.

The "Ring Nebula," known for almost 250 years, is so much more than a Ring. With JWST's capabilities, we're seeing more than ever before.

No planet enters retrograde more frequently than Mercury, which does so 3-4 times each year. Here’s the scientific explanation for why.

Can two planets stably share the same orbit? Conventional wisdom says no, but a look at Saturn's moons might tell a different story.

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.

Finding a tiny planet around bright stars dozens or hundreds of light-years from Earth is extremely difficult.

The nearby, bright star Fomalhaut had the first optically imaged planetary candidate. Using JWST's eyes, astronomers found so much more.

You can lead an overconfident chatbot to expert knowledge, but can it actually learn and assimilate new information?

Scientists are notoriously resistant to new ideas. Are they falling prey to groupthink? Or are our current theories just that successful?

Scientists have been chasing the dream of harnessing the reactions that power the Sun since the dawn of the atomic era. Interest, and investment, in the carbon-free energy source is heating up.

Unless you have a critical mass of heavy elements when your star first forms, planets, including rocky ones, are practically impossible.

The odds are slim, but the consequences would be literally world-ending. There really is a chance of a black hole devouring the Earth.

The visible Universe extends 46.1 billion light-years from us, while we've probed scales down to as small as ~10^-19 meters.

Many planets will eventually be devoured by their parent star. For the first time, we caught a star in the act, eating its innermost planet!

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.

The strongest tests of curved space are only possible around the lowest-mass black holes of all. Their small event horizons are the key.

For a thousand light-years in all directions, there's a "bubble" that the Sun sits at the center of. Here's the story behind it.

Even with the quantum rules governing the Universe, there are limits to what matter can withstand. Beyond that, black holes are unavoidable.

1.9 billion years ago, a star's explosive death created a black hole. Its light just arrived at Earth. But did it set a cosmic record?

NASA is creating a planet habitability index, and Earth may not be at the top. With our current data, ranking habitability is guesswork.