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The first website (1), created by the Department of Physics at Syracuse University, provides an educational, easily understandable explanation of the characteristics of a black hole. Students can learn the consequences a spacecraft would face if it traveled near or through the horizon of a black hole. The next website (2 ), created by the Amazing Space education group of the Space Telescope Science Institute's Office of Public Outreach, provides an online interactive exploration of black holes. Through this large, vibrant website, students can learn about stellar, supermassive, and miniature black holes. Teachers can find many amazing images, lesson plans, and other scientific background information. NASA created the next website (3) as a directory to many websites discussing black holes. Visitors can listen to the sound of a black hole, ask a NASA scientist questions, take a journey into a Black Hole, and much more. Wikipedia (4) investigates the questions related to how classical theories of thermodynamics are upheld within black holes. Students and educators will find links for many of the physical terms used within the descriptions to obtain further information. Robert M. Wald at the University of Chicago discusses Hawking radiation, the generalized second law, the thermodynamics of black holes, and entropy (5). This more advanced description provides numerous references and equations, as well as a discussion on issues the author feels are unresolved. J.E. Avron at the Israel Institute of Technology provides a straightforward discussion of the thermodynamics and entropy of black holes for those not familiar with the theory of general relativity (6). Through this pdf document, students can learn about the Planck scale, the temperature of black holes, and the LaPlace argument. The last two websites are online news articles describing the latest developments of black holes. After a fifty-three hour observation, NASA scientists have concluded that the central region of the Perseus galaxy cluster is producing sound waves with a frequency over a million billion times lower than the limits of human hearing (7). After learning how these sound waves are thought to have been created, visitors can view an animation of the waves generated in the Perseus Cluster. The last website (8), provided by space.com, investigates the question "If I had the opportunity to look at a black hole, would it look like a hole all the way around or just a hole above and below a funnel?" Visitors can also learn the about the spinning of black holes.
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