What is a black hole? That is a question scientist's
have been pondering for many years. A black
hole is actually a star that has died! Okay here's where the math comes
in, a star maybe 20 times as big as our
sun has just fallen in upon itself. It will shrink into a "star" many
times smaller than the Earth
. It will shrink in size but the mass and gravitational pull will
flinch. Here's an example, if you have a piece of cloth stretched out,
and you put a basketball on it, the
basketball will sink into it. Now let's say you have a lead ball about
the weight of the basketball, but the size of
a marble, and you drop it on the cloth. It still has the same weight
but sinks far deeper into the cloth than the
basketball did. This is because of something called
Now let's see, I said that a black hole is a star that died. Let me explain. After a star that is a lot bigger than our sun has used up its energy and has a super nova, its force that is pushing out from the core will weaken greatly and it will begin to shrink from the force of gravity pulling in on it. . First it will shrink into a White Dwarf then a Neutron star until it is a black hole. The title "Black Hole" is very misleading because a black hole is neither black nor a hole. It is called "black" because no light can escape from it to reflect a color like indigo or blue. We see things blue or red because white light "hits" the object and only blue or red light (in this case) bounces off it into our eye. So if no light can escape then you can't see any color. A Black Hole is called a "hole" because it "sucks" everything in. This happens because of it's major gravitational field.
There is a point near a black hole called the Event Horizon. The event horizon is sort of like a point of no return. I'm not joking, once you go past it you can’t get out! Well okay something can, but it has to be able to travel faster than the speed of light (186,000 miles per second) because a black hole's escape velocity. The size of the event horizon depends on the size of the black hole.
Now let's talk about the Accretion Disk. The accretion disk is a "disk" of gas dust. The gas and dust partials colide and become hot.
All right Event Horizon and Accretion Disk covered. What about the gas jets? Gas jets are found "on" most black holes. These gas jets flow perpendicular to the accretion disk and can be millions of light years (5,900,000,000,000 miles=1 light year) in length. Gas jets usually appear when charged particals from what the black hole brings in interact with the intense magnetic field of the black hole. Sometimes people confuse them with X-rays that are emitted from a black hole.
There are three kinds of black holes. Stellar, supermassive, and miniature. Now I've been talking about stellar and supermassive. Both stellar and suppermassive come from stars, a supermassive is bigger than a stellar. Now what about miniature? Miniture black holes are thought to have origanated around the time of the BigBang. The extra particals left over from the BigBang collapsed in and had a strong force and eventualy became a black hole.