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Black Hole
Here's why the answer may forever elude scientists.
As early as we've been able to identify them, the youngest galaxies seem to have large supermassive black holes. Here's how they were made.
The first stars took tens or even hundreds of millions of years to form, and then died in the cosmic blink of an eye. Here's how.
The Universe is an amazing place. Under the incredible, infrared gaze of JWST, it's coming into focus better than ever before.
Thanks to observations of gravitational waves, scientists were able to settle a longstanding debate over the speed of gravity.
Since JWST first glimpsed the Universe, we've entered a new era in understanding the earliest objects in the Universe. What have we learned?
The brilliant mind who discovered the spacetime solution for rotating black holes claims singularities don't physically exist. Is he right?
The Big Bang theory is not threatened, but astrophysicists have some explaining to do.
All matter particles can act as waves, and massless light waves show particle-like behavior. Can gravitational waves also be particle-like?
With JWST, Chandra, and gravitational lensing combined, evidence has emerged for the earliest black hole ever. And wow, is it a surprise!
For the first time, astronomers have created a data-driven estimate for how many black holes are in our Universe: more than anyone expected.
From the Big Bang to black holes, singularities are hard to avoid. The math definitely predicts them, but are they truly, physically real?
The hot Big Bang was an energetic, brilliantly luminous event. Today's Universe is alight with stars. But in between, the dark ages ruled.
The matter that creates black holes won't be what comes out when they evaporate. Will the black hole information paradox ever be solved?
Even with the quantum rules governing the Universe, there are limits to what matter can withstand. Beyond that, black holes are unavoidable.
Nothing can escape from a black hole. So where do Hawking radiation, relativistic jets, and X-ray emissions around black holes come from?
What are supermassive black holes, how common are they, and how do they grow up throughout cosmic history? Listen and find out!
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.
Some 55 million light-years away lies the giant galaxy Messier 87. Its supermassive black hole, inside and out, looks better than ever.
After 15 years of monitoring 68 objects known as millisecond pulsars, we've found the Universe's background gravitational wave signal!
In a distant galaxy, a cosmic dance between two supermassive black holes emits periodic flashes of light.
The brightest gamma-ray burst ever observed, GRB 221009A behaved in unexpected ways that might help us understand how they occur.
There are 40 billion billion black holes in the universe. Here’s how our Solar System stacks up against ten of them.
When Einstein gave General Relativity to the world, he included an extraneous cosmological constant. How did his 'biggest blunder' occur?
In 1974, Hawking showed that black holes aren't stable, but emit radiation and decay. Nearly 50 years later, it isn't just for black holes.
Massive objects like black holes, stars, and rogue planets routinely pass near our Solar System. An ensuing comet storm could destroy us.
The odds are slim, but the consequences would be literally world-ending. There really is a chance of a black hole devouring the Earth.
Though he renounced philosophy, Stephen Hawking's final theory of the universe redraws the basic foundations of cosmology.
Stars orbiting black holes were observed to move significantly slower than expected. One explanation centers on dark matter.
Leading a scientific revolution is easy: you just have to succeed where the current theory fails while equaling its successes. Good luck!