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Black Holes and Stephen Hawking

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Black Holes An object that is so compact that light can’t escape its gravitational pull is called a black hole. The density of this object is extremely high; while it has a small mass, is called a singularity. Around the singularity point, there is an event horizon also known as the gravitational radius. The event horizon is the establish boundary where nothing can escape, there is no communications from the objects inside and outside. A black hole is formed when a massive star collapses on itself. To determine if the star will create a black hole, the mass of the star must be looked at. If the star has a low-mass, when the core collapses the star will create a strong explosion, but will have little fall back. This low-mass explosion will cause a neutron star. If the star has a moderate-mass, it will produce an explosion, but will create enough fall back to form a black-hole. A high-massed star, won’t launch any shocks. Since the stars will be unable to create any shocks, it will automatically create a black hole. The stars mass will normally be 25M or above, in order to create a black hole. A collapsing star, happens because of neutrino-energy decomposition. During the stars life, there are two major forces acting within the star. The two forces are nuclear fission and gravity. When the nuclear fission runs out of fuel, gravity is pulling the star inwards. When this happens, a shock occurs in the core when the star collapses within its self. When the shock occurs, it leaves behind an unstable entropy gradient. The entropy gradient creates a convective layer around the stalled shock, then shrinks down to the star surface. The cool material near the star, heat is created through the neutrino absorption, the counteraction is t... ... middle of paper ... ... the potential to change everything that is known about black holes. Works Cited Fryer, Chris L. "Mass Limits For Black Hole Formation." The Astrophysical Journal 522.1 (1999): 413-18. Print. Hawking, S. W., and G. F. R. Ellis. "Gravitational Collapse and Black Holes." The Large Scale Structure of Space-time. London: Cambridge Univ., 1973. 299-347. Print. Hawking, Stephen W. "Information Preservation and Weather Forecasting for Black Holes." 1DAMTP, University of Cambridge, UK (2014): 1-4. Cambridge. Web. Hawking, Stephen W. "Particle Creation by Black Holes." Communications in Mathematical Physics 43.3 (1975): n. pag. Web. 16 Apr. 2014. Hughes, Scott A., Charles R. Keeton, 11, Paul Walker, Kevin T. Walsh, Stuart L. Shapiro, and Saul A. Teukolsky. "Finding Black Holes in Numerical Spacetimes." Physical Review. 8th ed. Vol. 49. N.p.: n.p., n.d. N. pag. Print.
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