Black Holes...?

Question

What data have scientists gathered about black holes?

Answer 1

OK.....black holes are really stars...because after the red-giant explodes it becomes either a neutron star or black hole. The reason why you don't see any light is because the gravity is so immense that light cannot escape. So to find one scientists can find one in two ways that i know of. They can use a special telescope to view radiation. Or they can look into any spiral galaxy. *At the center of every spiral galaxy is a black hole * a lot of gravity+ dust, gas, and other things with less gravity= rotation. So that's really just a summary of what we know. We also know that black holes could possibly be worm holes. Which could lead us to another part of universe or a whole other universe entirely. This isn't proved seeing as how the nearest black hole is tons of light years away. We also believe that after you are *sucked* into the black hole, and after you are sent somewhere, that you are regurgitated so to speak out of a white hole. Which as you can guess is the exact opposite. I hope i helped you.


:)

Answer 2

A black hole is an object with a gravitational field so powerful that a region of space becomes cut off from the rest of the universe – no matter or radiation (including light) that has entered the region can ever escape. The lack of escaping electromagnetic radiation renders the inside of black holes (beyond the event horizon) invisible, hence the name. However, black holes can be detectable if they interact with matter, e.g. by sucking in gas from an orbiting star. The gas spirals inward, heating up to very high temperatures and emitting large amounts of light, X-rays and Gamma rays in the process while still outside of the event horizon. Black holes are also thought to emit a weak form of thermal energy called Hawking radiation. While the idea of an object with gravity strong enough to prevent light from escaping was proposed in the 18th century, black holes as presently understood are described by Einstein's theory of general relativity, developed in 1916. This theory predicts that when a large enough amount of mass is present within a sufficiently small region of space, all paths through space are warped inwards towards the center of the volume. When an object is compressed enough for this to occur, collapse is unavoidable (it would take infinite strength to resist collapsing into a black hole). When an object passes within the event horizon at the boundary of the black hole, it is lost forever (it would take an infinite amount of effort for an object to climb out from inside the hole). Although the object would be reduced to a singularity, the information it carries is not lost.

While general relativity describes a black hole as a region of empty space with a point like singularity at the center and an event horizon at the outer edge, the description changes when the effects of quantum mechanics are taken into account. The final, correct description of black holes, requiring a theory of quantum gravity, is unknown.

Answer 3

Look up the Chandra space telescope. It's an xray telescope that studies black holes.

Answer 4

The only ways to see a black hole is if it emmits radiation.I am not sure if anyone has seen one yet. As they say seing is believing.