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If black holes are "black" how do scientists know they are there?
A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting, a black hole.
When a black hole and a star are close together, high-energy light is made. This kind of light can not be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.
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How is NASA studying black holes?
NASA is using sattelites and telescopes that are traveling in space to learn more about black holes.
These spacecrafts help scientists awnser questions about the Universe.
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How do black holes form?
Scientists think the smallest black holes formed when the universe began.
Stellar black holes are made when the center of a very big star falls in upon itself, or collapses. When this happens, it causes a supernova. A supernova is an exploding star that blasts part of the star into space.
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What is a black hole?
A black hole is a place in space here gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can't see black holes. They are invisible. Spa...
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Could a black hole destroy earth?
Black holes do not go around in space eating stars, moons and planets. Earth will not fall into a black hole because no black hole is close enough to the solar system for Earth to do that.
Even if a black hole the same mass as the sun were to take the place of the sun, Earth still would no...
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What's The Block Hole
A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can't see black holes. They...
What would happen if you would try to get close to a black hole?
First of all, you would see the strangest funhouse mirror in the universe. Matter isn't the only thing orbiting a black hole: Gravity is so strong near them that light can orbit too.
- If you hovered just outside the event horizon, at the photon sphere, in any direc...
What Are Black Holes ?
- ….. was a star so massive that it had collapsed in on itself.
- It’s so massive that not even light can escape its gravity, which is why it’s almost perfectly black.
- It’s gravitational pull is so powerful, it warps and distorts not only light but also...
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