Black Holes

Black Holes

Table of Contents

I. What are black holes?

II. Where do they come from?

III. Interesting facts about black holes.

IV. How are they discovered?

A. X-ray Emissions

B. Exotic Energy Sources

C. Star speeds

D. Masers

E. The Baseline Array

F. Hubble Telescope

G. Satellites

V. Quasi-Stellar Relations

VI. Locations

A. M87

B. Milky Way

C. Andromeda

D. ??????

E. NGC 6240

F. A0620-00

What are black holes? Black holes are the remains of a massive star that has collapsed and shrunk

to a tiny point in space. They have all of the gravity of the star concentrated into that point. Black holes

are difficult to see because they cannot be seen. They cannot be seen because they are spinning faster than

the speed of light and light cannot escape from them. They can be compared to a giant vacuum cleaner,

they suck in anything that gets near them.

Where do black holes come from? Black holes are formed when giant stars run out of fuel and are

overwhelmed by their own gravity. When this happens they cannot keep from collapsing. After stars

collapse, they start rotating and as they are

spinning, their gravity becomes stronger causing them to shrink. As the object becomes smaller, it starts

spinning faster and faster.

Using a small black marble as an example of the size that Earth would become if it collapsed and

beca...

Black Holes

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