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A black hole is a massive, compact astronomical object so dense that its gravity prevents anything from escaping, even light. Albert Einstein 's theory of general relativity predicts that a sufficiently compact mass will form a black hole. [4] The boundary of no escape is called the event horizon. A black hole has a great effect on the fate and circumstances of an object crossing it, but has ...
Learn about the three main classes of black holes: stellar-mass, intermediate-mass and supermassive. Find out how they form, grow, emit and interact with their surroundings.
The black hole is 6.5 billion times more massive than the Sun. This picture was the first direct visual evidence of a supermassive black hole and its shadow. The ring is brighter on one side because the black hole is rotating, and thus material on the side of the black hole turning toward Earth has its emission boosted by the Doppler effect.
Black holes are points in space that are so dense they create deep gravity sinks. Beyond a certain region, not even light can escape the powerful tug of a black hole's gravity. And anything that ...
Black holes are some of the most fascinating objects in the universe. When you purchase through links on our site, we may earn an affiliate commission. Here's how it works. Black holes are some ...
Black Holes Black holes are among the most mysterious cosmic objects, much studied but not fully understood. These objects aren't really holes. They're huge concentrations of matter packed into very tiny spaces. A black hole is so dense that gravity just beneath its surface, the event horizon, is strong enough that nothing - not even light - can escape. The event horizon isn't a ...
Advancing tools and techniques are revealing more about black holes, but they also raise more questions that continue to capture the imaginations of people everywhere. Questions like, what is inside a black hole? What is the nearest black hole to Earth? What causes a black hole? Dr. Joe Pesce, an astrophysicist with the U.S. National Science Foundation, joins to answer some popular questions ...
What do black holes look like? In April 2019 astronomers took the first ever photo of a black hole. The image was taken by the Event Horizon Telescope, an array of radio telescopes around the world designed specifically to capture an image of a black hole. The image shows a supermassive black hole, located at the galactic core of Messier 87, 500 million trillion km away from Earth. The dark ...
A black hole's singularity is an infinitely tiny point in its innermost region. The boundary surrounding a black hole, known as the event horizon, varies in size.
Black holes fascinate both the public and scientists—they push the limits of our understanding about matter, space and time. Scientists at the University of Chicago and across the world have made many discoveries about our universe with the help of black holes, but there's a lot we still don't know about these extraordinary cosmic phenomena.