99,000 Essays & Term Papers: Where You Buy Essays and Papers Online
Direct Essays, Where You Can Buy Essays and Papers Online

Instant Access to Buy Essays and Papers Online!
Acceptable Use Policy
Customer Service
Site Search


Login to View Essays and Papers Online

Join Now - Instant Access to Essays and Research Papers!

  Essay and Research Paper Topics
Acceptance Essays
Arts Essays
Custom Essays
English Literature Essays
Foreign
History Essays
Miscellaneous Research Papers and Essays
Movie Essays and Papers
Music Term Papers
Novels
People and Biography Research Papers
Politics Research Papers
Religion Research Papers
Science Essay Topics
Sports Research Papers
Technology Research Papers
 
  FAQ
Technical Support
Site Map
Direct Essays
 

 



Welcome to Direct Essays

This is a short summary of this paper!

Already a member? Go here to log in and view the entire paper!


Join Now!
by: Credit Card
Join Now!
by: Online Check
Join Now!
by: Phone 1-900
Special! View this paper for FREE!
  

black holes

Black holes are the evolutionary end to a massive star. Although it is hard to imagine , a black hole comes directly from a star. Stars come from dust and gas in the atmosphere , that heat up and start giving off radiation. These are known as protostars. A protostar will brighten and continually contract and rise in temperature. As the temperature increases the pressure increases which brings you to a point where the outward force balances the inward force of gravity. The dust soon vaporizes, and the gas turns opaque. Black holes are formed when a massive star or supernovae ends it's life. The process where the star evolves and then dies is called stellar evolution. At the end of a stars life it is involved in a supernovae explosion. This explosion burns away the elements in astar except for the iron core because as we know iron cannot burn.

When the iron core reaches a certain mass, a sequence of events is triggered. Gravity over rules the pressure that had been stabilizing it, and the iron core collapses. The core goes from the size of about five thousand miles to the small size of about twelve miles in less than a second.. At this point the star has reached singularity. Singularity is when a star is compressed to a p


Since we cannot se a black hole we must find other ways of detecting them. A black hole attracts matter, and although much of the matter is sucked into the black hole some is left orbiting around it. This matter forms an acctetion disk which heats up as it orbits at a high velocity around the black hole. The gas soon starts to radiate and give off x rays. These x rays are our key to detecting black holes. Using these rays, we can detect where the starting place of the x rays are.

The amount of energy released during the collapse is equivalent to the amount of energy released by one hundred stars in their ten billion year lifetimes. This amount of energy is extremely enormous, and most of it is sent into space by particles called neutrinos. A very small amount of this energy is sent into the envelope enclosing the star, and it causes the envelope to explode The energy deposited on the envelope creates an incredibly strong shock wave. As the shock waves go outward they heat up the envelope and induce explosive nuclear burning that ejects the envelope at about ten million miles per hour. The result of these event's leave a compact stellar remnant. This remnant is a neutron star or black hole. Only the most massive stars become black holes. The rest become less compressed bodies which are either white dwarfs or neutron stars.

Black holes are filled with many natural phenomenon's , gravity crushes and forms it. Light makes them so

Some common words found in the essay are:
, black hole, black holes, amount energy, event horizon, iron core, gravitational radius, dwarfs neutron stars, black hole center, amount energy released, white dwarfs neutron, radius event, massive stars, massive star, speed light, black hole mass,
Approximate Word count = 972
Approximate Pages = 4 (250 words per page double spaced)


  

More Essays on black holes

Black Holes770 words
Black Holes1256 words
Black Holes 2891 words
Black Holes898 words
Black Holes998 words

Look at even more essays on black holes
More Science Essays

Professional Papers:
Black Holes2014 words
Black Holes Concept2052 words
The Hubble Space Telescope1378 words
Hawkinamp39s Thesis of the Universe2733 words
The Hubble Telescope4483 words
Supernova2259 words
Special! View this paper for FREE!
Click here to JoinNow!
by: Credit Card
Click here to Join Now!
by: Online Check
Click here to Join Now!
by: Phone 1-900

 

All papers and essays are for research and reference purposes only!
Copyright 2002-2009 Direct Essays , LLC. All Rights Reserved. DMCA
Webmasters make $$$$
Saved Papers