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Transcript of blackholes
a gravitational field so
intense that no matter or
radiation can escape.
Not even light can get out. created? Stars remain the same size because of balanced forces: heat made by burning fuels pushes the star out and gravity pulls it in. After a star used
up it's fuel, it collapses under it's own weight. When this happens it causes a super nova. If the star has more than
3.2 times the mass of the sun
(known as solar masses)
it can become a black hole!
We can see that a star is going around in orbit around something else that we can't see, and we can see gases that the black hole has "sucked off" from the other star. Are we in danger? Since we are on the outside of our galaxy; on one of the spiral arms we are far from any black holes. Jump into a black hole It would be a one-way trip The difference in forces acting on your head and feet would stretch you like a taffy. Two types of black holes stellar and supermassive blackholes Stellar Black holes
The smallest black hole is as big as an atom.
They are small but have the mass of a large mountain.
Up to 20 times more than the mass of the sun. Supermassive black holes
Have masses that are 1million suns put together.
They were made the same time as the galaxy they are in. Scientists believe that the smallest black hole formed when the universe began. A supernova is an exploding star that blasts parts of the star into space. Then the astronaut would meet their death as their atoms compress to infinite destiny and they reach the center of the black hole. How do we know
black holes exists? Black holes used to be theories but now..
On February 27 1994, the Hubble space telescope discovered what seemed to be a black hole. The American scientists John Wheeler was the one who created the term black hole, in 1979. (before they were called frozen stars). They are only different from each other due to their mass and their spin. Fortunately for us there are no black holes near our solar system. Launched last June
NuSTAR is the first orbiting telescope with the ability to focus high-energy X-ray light. Can see high-energy objects already, including black holes near and far, and the incredibly dense cores of dead stars. Mission (NuSTAR) Black holes are
because... 1. The center of a black hole is __________. All black holes are truly invisible. We can't actually see black holes because they don't reflect light. They don't live forever, but slowly evaporate returning their energy to the universe. The center of a black hole, where all its' mass resides, is called singularity. 2.You can see a black holes with you bare eyes.
(truth or false) 3. How many types of black holes are their and what are they called? 4. How much mass does a star have to have to become a black hole? 5. Supernova is...
a). the Largest type of black hole.
b). the tool used to see black holes.
c). an exploding star that blasts parts of the star into space.
d). the center of a black hole. Learning
Objectives Quiz What is the definition of singularity. Is there a way to see a black hole with bare eye. How much mass a star has to be to become a black hole in the future. What exactly is a supernova. If there are multiple types of blacks holes and what they are called. My (mercury)