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SUBSCRIBE to Space with Sarah: http://tinyurl.com/k5wxw6x What has Sarah been up to in all these months of video silence? What is her research all about? Will we colonize Mars, and why do we trust the type 1a supernovae results on the accelerated expansion of space? In this Qu0026A for Space with Sarah season 1 astrophysicist, Sarah, answers YouTube questions about space from previous episodes. In particular Sarah discusses her research on tidal streams, galaxy evolution and dark matter, she discusses colonization of Mars, the expanding Universe and type 1a supernova explosions. Link to Nobel Prize press release from 2011: https://www.nobelprize.org/nobel_prizes/physics/laureates/2011/advanced-physicsprize2011.pdf Partially funded by NSF grant AST-1715944. Creator: Sarah Pearson Producer: Brett Van Deusen Production Assistant: Julie Hammer (@juliehammer) Image credits: Illustris Project: http://www.illustris-project.org/ Pearson et al. 2017, Nature Astronomy, 9 NASA Via Lactea II - Diemand et al. 2008, Nature Episode music by Krychek: http://krychek.nyc Sound design by Tim Korn Dungeon Beach: http://dungeonbeach.com/ Color correction: Jeff Sousa Partially supported by the National Science Foundation: NSF grant AST-1614743