Black holes
When stars that are about three-times the mass of the sun "die," they will experience an iron core collapse followed by a supernova. The gravitational pull from the core collapse will eventually form a neutron star. However, when stars that are eight-times or greater the mass of the sun "die" something extraordinary can happen. Scientific models have demonstrated that when these high mass stars experience an iron core collapse and subsequent supernova, the gravitational pull from the iron core collapse may be so strong that it pulls all or most of the matter that it blew out from the supernova back into the collapsed core. The addition of this huge volume of mass sets off a chain reaction that causes heat and pressure to increase the strength of gravity exponentially until gravity's "crush" becomes infinite. This phenomenon is called a "Black Hole". Black Holes are named such because in theory the gravitation force inside the black hole is so strong that not even light can escape from falling into its center.Although there is still very much that we do not know about black holes, astronomers are gathering more information about them all the time. Because black holes do not emit any visible light,
Even before the star meets its final doom, the event horizon forms, balloons out, breaks through the star's surface at the very moment it shrinks through the critical circumference. This is what some believe to be a fact and not just a "Twilight Zone" episode. These duplicates of you living in parallel universes like ours. It all started when superstring theory, hyperspace and dark matter made physicists realize that the three dimensions we thought described the Universe weren't enough. The x-ray binary called Cygnus X-1 may be the most promising observational evidence of a black hole. The x- rays can escape because the disk emits from well outside the event horizon (Bennett, J. Careful study of X-ray emissions from the unseen companion indicates that it must be very small in size. At this point in time, the apparent and event horizons merge as one. There is "Star Trek" on the small screen and then on the big screen there are the "Back to the Future" movies. Time Travel Time travel is one of the best selling fictional story lines in America's entertainment history. Retrieved on December 7, 2004 from http://www. Imagine that you wanted to travel from Earth to Sirius- this trip would take you 9 light years.
Common topics in this essay:
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Acceptance Essays
