The mass that gravitates and the mass that resists motion are, somehow, the same mass. But even Einstein didn’t know why this is so.
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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.
NASA has finally chosen which flagship mission, like Hubble and JWST, will launch in ~2040. Detecting alien life is now a reachable goal.
So far, Earth is the only planet that we’re certain possesses active life processes. Here’s what we shouldn’t assume about life elsewhere.
Recasting the iconic Carrington Event as just one of many superstorms in Earth’s past, scientists reveal the potential for even more massive eruptions from the sun.
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?
“I hope we take a mindset where we are willing to look for weird life in weird places.”
The least exciting of all eclipses, a penumbral lunar eclipse, foreshadows the spectacular show that April 8th’s total eclipse will bring.
The Te’omim Cave in the Jerusalem Hills is filled with skulls and oil lamps — objects a new study says may have been used in dark rituals.
Supermassive black holes at the centers of galaxies gobble up whatever matter ventures too close, becoming active. Here’s how they work.
In 2017, we detected gold being forged in a neutron star-neutron star merger. Now, in 2024, the amounts created simply don’t add up.
Earth is actively broadcasting and actively searching for intelligent civilizations. But could our technology even detect ourselves?
These 10 best practices can help organizations develop high-quality and engaging training videos for employees.
Astronomers have been looking for radio waves sent by a distant civilization for more than 60 years.
The odds are slim, but the consequences would be literally world-ending. There really is a chance of a black hole devouring the Earth.
If you said “with the Big Bang,” congratulations: that was our best answer as of ~1979. Here’s what we’ve learned in all the time since.
The world is aging, and with age comes vision decline. New research may have found how to improve eyesight in an accessible way.
It’s common knowledge that syncing your circadian rhythm to a natural light-dark cycle could improve your health and well-being.
With ~400 billion stars in the Milky Way and 6-20 trillion galaxies overall, that makes for a lot of stars. But not as many as you’d think.
Here in our Solar System, we only have one star: a singlet. For many systems, including the highest-mass ones, that’s anything but the norm.
Deep learning AI has accurately created color images from night vision images.
The Schumann resonances are the background hum of the entire planet. But they don’t affect humans in any way.
A new all-time record! JWST’s discovery of JADES-GS-z14-0 pushes the earliest galaxy ever seen to just 290 million years after the Big Bang.
Known as hypervelocity stars, we originally thought just one would be ejected every 100,000 years. The real number is much greater.
In the quest to measure how antimatter falls, the possibility that it fell “up” provided hope for warp drive. Here’s how it all fell apart.
We should acknowledge that there are faith-based myths running deep in science’s canon.
ChatGPT doesn’t understand physics, but it memorizes very well and puts in extra effort.
Freethink asks three different kinds of experts to answer this question.
The first elements in the Universe formed just minutes after the Big Bang, but it took hundreds of thousands of years before atoms formed.
Our Universe requires dark matter in order to make sense of things, astrophysically. Could massive photons do the trick?