Black Holes
The escape velocity of the Earth is about 11 km/s. The sun has an escape velocity of 600 km/s. A neutron star can have an escape velocity of 150,000 km/s. What is the escape velocity at the event horizon of a black hole?
300,000 km/s(the speed of light)
It wont happen on its own, but in order to form a black hole with a star the mass of our sun, it would need to be compressed to a diameter of only
6 km
In March 2011, a star which wandered in too close to a black hole was
completely ripped apart and briefly flared to be as bright as a trillion suns
When light escapes from a black hole, it appears to lose energy. This is known as
gravitational redshift
What will happen to the Earth when the sun becomes a black hole?
bad question, the sun will never be able to form a black hole
If a supernova remnant core has a mass greater than 2.8 solar masses, then what force will be able to stop gravity from collapsing the core?
nothing, it's not possible to stop gravity in this case
If you were to fall feet first into a 10 solar mass black hole, the tidal forces would
spaghettify you
A black hole with a mass between 3 solar masses and 12 (it could be more than this though) solar masses is considered to be a
stellar black hole
At the core of nearly every galaxy is higher mass black hole. The first one that was conclusively observed is the one at the center of the Milky Way with a mass of more than 4 million solar masses. These black holes at the centers of glaxies are known as a
supermassive black hole
According to Einstein's theory of general relativity, the force that we perceive to be gravity is really just the warping of the fabric of spacetime. The presence of mass causes this fabric to be warped and the larger the mass, the more it warps spacetime. The strange thing is that time will not pass the same for people in different gravitational fields, according to an outside observer. The greater the warping of spacetime (the stronger the gravitational field)
the slower the clocks will appear to tick
