David Spergel, Our Simple Strange Universe
Our universe seems to be both remarkably simple and very strange. With 5 basic numbers (its age, the density of atoms and matter, and a description of its initial lumpiness), we can completely describe cosmology. On the other hand, there is so much that we don’t understand: more than 95% of the universe is in the form of dark matter and dark energy. I will describe how observations of the microwave background, the left-over heat from the Big Bang, have helped shape our understanding of cosmology and how future observations could reveal the origin of cosmic acceleration.
David Spergel is the Charles Young Professor of Astronomy on the Class of 1897 Foundation at Princeton University and the director of the Center for Computational Astrophysics at the Flatiron Institute in New York. He serves as co-chair of the Wide Field Infrared Survey Telescope (WFIRST) science team. WFIRST will study the nature of dark energy, complete the demographic survey of extrasolar planets, characterize the atmospheres of nearby planets and survey the universe with more than 100 times the field of view of the Hubble Space Telescope. Professor Spergel is also the co-chair of the Global Coordination of Ground and Space Astrophysics working group of the International Astronomical Union.
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