PPT-Shape of the Universe

Ryan Broll Overview Always referring to shape at all times because of special relativity Curvature vs Topology Flat or curved vs Open or closed FLRW model Named after scientists. . Anthony Lasenby. Astrophysics Group. Cavendish Laboratory. Cambridge, UK. a.n.lasenby@mrao.cam.ac.uk. www.mrao.cam.ac.uk/~clifford. Overview. Want to share two recent exciting developments. Recent progress in cosmology. Hubble Expansion and the Big Bang . The fact that more distant galaxies. have higher . redshifts. . indicates that the universe is expanding. This implies that the universe was born in a huge explosion, or . the Universe. The Uniform Temperature of the Early Universe. The brighter and darker spots in the microwave background correspond to hotter and cooler areas in the universe (at an age of 400,000 years). However, the hotter spots are only a tiny bit hotter than the cooler spots. So all . Ryan Broll. Overview. Always referring to “shape” at all times, because of special relativity.. Curvature vs. Topology. “Flat or curved” vs. “Open or closed”. FLRW model. Named after scientists. From t=0 to the CBR Era. The CBR. Universe hotter & denser in the past. For T high enough - ionized & opaque – blackbody. and. Currently T=2.726 K. z(opaque. . transparent)~1100 K. Lecture 2; . April 9 2013. Previously.. On Astro-2. The goal of cosmology is to understand how the universe formed and evolved.. How can we build a theory of the universe valid at all times in every place? . The universe is the sum of all energy, matter, space and time.. But there. ’. s a difference between the universe we see (the observable universe) . and the universe as it really exists.. This gets complicated….. The universe is a big place, perhaps the biggest. . –Kurt Vonnegut. Cosmology. Cosmology is the study of the nature of the universe, how the universe began and how it will end, if it does. There is religious cosmology, and scientific cosmology. The universe is a big place, perhaps the biggest. . –Kurt Vonnegut. Cosmology. Cosmology is the study of the nature of the universe, how the universe began and how it will end, if it does. There is religious cosmology, and scientific cosmology. Robert “Dr. Bob” Gardner. East Tennessee State University. Department of Mathematics and Statistics. http://kipac.stanford.edu/kipac/research/primordial_inflation. Jeffrey R. Weeks'.  . The Shape of Space. Robert “Dr. Bob” Gardner. East Tennessee State University. Department of Mathematics and Statistics. http://kipac.stanford.edu/kipac/research/primordial_inflation. Jeffrey R. Weeks'.  . The Shape of Space. The universe is a big place, perhaps the biggest. . –Kurt Vonnegut. Cosmology. Cosmology is the study of the nature of the universe, how the universe began and how it will end, if it does. There is religious cosmology, and scientific cosmology. If the universe was 1 year old . . .. Science/religion – either/or?. How do we predict the conditions of the early universe?. What are the different eras in the early universe?. What key lines of evidence support the Big Bang model?. How did a single genesis event create billions of galaxies, black holes, stars and planets? How did atoms assemble -- here on earth, and perhaps on other worlds -- into living beings intricate enough to ponder their origins? What fundamental laws govern our universe?This book describes new discoveries and offers remarkable insights into these fundamental questions. There are deep connections between stars and atoms, between the cosmos and the microworld. Just six numbers, imprinted in the big bang, determine the essential features of our entire physical world. Moreover, cosmic evolution is astonishingly sensitive to the values of these numbers. If any one of them were untuned, there could be no stars and no life. This realization offers a radically new perspective on our universe, our place in it, and the nature of physical laws.