# Event horizon black hole

## How big is a black hole event horizon?

There is simply a region, or boundary, in space around a black hole beyond which we cannot see. This boundary is called the event horizon. The radius of the event horizon (proportional to the mass) is very small, only 30 kilometers for a non-spinning black hole with the mass of 10 Suns.

## Does time stop at the event horizon of a black hole?

To a faraway observer, your time slows down and appears to stop for you at the horizon. Time never stops for you. … So if are far from a black hole, at the horizon, or falling inside, your measure of time is the same. To a faraway observer, your time slows down and appears to stop for you at the horizon.

## What does an event horizon look like?

The event horizon is like a shell around the black hole. Once any matter—or even light—reaches the event horizon, it’s game over. The black hole grows in size as it consumes matter, and the event horizon expands too. … That material speeds up to relativistic speeds, which means close to the speed of light.

## Would a black hole kill you?

So, to summarize. You wouldn’t survive falling toward a black hole. … Unfortunately, this goes along with those who suspect black holes are actually some sort of portal. For a solar mass black hole, the tidal forces near the event horizon can be quite large, so they will kill you before you cross the event horizon.

## What happens if a person goes into a black hole?

Of course, no matter what type of black hole you fall into, you’re ultimately going to get torn apart by the extreme gravity. No material, especially fleshy human bodies, could survive intact. So once you pass beyond the edge of the event horizon, you’re done.

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## What happens to time inside a black hole?

As you get closer to a black hole, the flow of time slows down, compared to flow of time far from the hole. (According to Einstein’s theory, any massive body, including the Earth, produces this effect. … Inside the black hole, the flow of time itself draws falling objects into the center of the black hole.

## Could a human survive a black hole?

Nothing escapes a black hole. Any trip into a black hole would be one way. The gravity is too strong and you could not go back in space and time to return home. Aside from this, your body would be stretched and destroyed by the warping of space and the amount of radiation surrounding the event horizon.

## What’s inside a black hole?

The event horizon is where the escape speed exceeds the speed of light: you’d have to be going faster than light (which is impossible for any bit of matter) to escape the black hole’s gravity. Inside the event horizon is where physics goes crazy. … A singularity is what all the matter in a black hole gets crushed into.

## What would you see if you fell into a black hole?

“First of all, you approach the speed of light as you fall into the black hole. … So if you’re able to look forward toward the black hole, you see every object that has fallen into it in the past. And then if you look backwards, you’ll be able to see everything that will ever fall into the black hole behind you.

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## Can you see a black hole?

Black holes have gravitational fields so strong that even light cannot escape, so they are defined by the shell of a black, featureless sphere called an event horizon. But the holes can nevertheless be seen. As they consume matter that strays too close, they squeeze it into a superheated disk of glowing gas.

## How did they take a picture of a black hole?

Using the Event Horizon Telescope, scientists obtained an image of the black hole at the center of galaxy M87, outlined by emission from hot gas swirling around it under the influence of strong gravity near its event horizon.

## What are the four types of black holes?

And anything that ventures too close—be it star, planet, or spacecraft—will be stretched and compressed like putty in a theoretical process aptly known as spaghettification. There are four types of black holes: stellar, intermediate, supermassive, and miniature.

Stephen Hawking

## Is dying in a black hole painful?

While some have hypothesised that ‘death by black hole’ would involve a painful roasting, generally, physicists agree that if you get too close to the event horizon, your body would be ‘spagettified’ as the gravitational tidal forces stretched you apart.