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25 - Today Announcements HW#10 is due Fri 4/23 8:00 am...

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ISP209s10 Lecture 25 -1- Today • Announcements: HW#10 is due Fri 4/23 8:00 am Exam #3 Thurs. April 29 Final Exam will be on CAPA (take-home) Dark Matter and Dark Energy String Theory as a theory of everything PBS NOVA “The Elegant Universe”
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ISP209s10 Lecture 25 -2- Links to videos viewed in this class http://www.pbs.org/wgbh/nova/sciencenow/0304/02.html http://www.pbs.org/wgbh/nova/sciencenow/0305/02.html http://www.pbs.org/wgbh/nova/sciencenow/0301/01.html http://www.pbs.org/wgbh/nova/blackhole/program.html (Ch.2 and 4) http://www.pbs.org/wgbh/nova/origins/program-3114-t.html (Ch.1 and parts of Ch. 2 and 4) http://www.pbs.org/wgbh/nova/elegant/program_t.html (Bits and pieces of Hour 3)
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ISP209s10 Lecture 25 -3- The Universe is mostly Dark Matter/Energy 4% of the Universe is made of the same stuff as us. Dark energy actually acts like anti-gravity and is pushing the universe apart. We can tell this because distance supernova are moving away faster than they should. The expansion of the universe is accelerating. Dark matter is probably some type of undiscovered particle(s). E.g., WIMPs (Weakly interacting massive particles).
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