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Crash of the Titans: Hubble's Universe Unfiltered

Astronomers have known for decades that our Milky Way Galaxy and the neighboring Andromeda Galaxy are approaching each other. What we haven't known is just how close the encounter will be. Recent Hubble measurements have been able to pin down the trajectory with a smashing conclusion: in about four billion years the two galaxies will crash together in a nearly head-on collision. Further, the spiral galaxies will have completely merged and transformed to create a single elliptical galaxy around six billion years in the future. "Hubble's Universe Unfiltered" is a recurring broadcast from HubbleSite.org, online home of the Hubble Space Telescope. Astrophysicist Frank Summers takes viewers on an in-depth tour of the latest Hubble discoveries. Find more episodes at HubbleSite.org. HubbleSite page: http://hubblesite.org/explore_astrono... Notes NASA's Hubble Shows Milky Way is Destined for Head-on Collision with Andromeda Galaxy: http://hubblesite.org/newscenter/arch... Milky Way drawing Credit: NASA, JPL-Caltech, R. Hurt (SSC-Caltech) http://www.spitzer.caltech.edu/images... Milky Way panorama Copyright: Axel Mellinger (used with permission) http://home.arcor-online.de/axel.mell... Large Magellanic Cloud Credit: David Malin Copyright: Australian Astronomical Observatory (used with permission) http://www.aao.gov.au/images/captions... Small Magellanic Cloud Credit: NOAO/AURA/NSF http://www.noao.edu/image_gallery/htm... Andromeda Galaxy Credit: Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF http://www.noao.edu/image_gallery/htm... Triangulum Galaxy Credit: T.A.Rector (NRAO/AUI/NSF and NOAO/AURA/NSF) and M.Hanna (NOAO/AURA/NSF) http://www.noao.edu/image_gallery/htm... Local Group Schematic Credit: Christine Godfrey Visible Light Spectrum Credit: Wikimedia Commons user Philip Roman http://commons.wikimedia.org/wiki/Fil... Neon Pizza Sign http://free-images-etc.rb-d.com/wp-co... Neon Spectral Lines Credit: Wikimedia Commons user Jan Homann http://commons.wikimedia.org/wiki/Fil... Hydrogen Spectral Lines Credit: Wikimedia Commons user Jkasd http://commons.wikimedia.org/wiki/Fil... Interacting Galaxies UGC 8835 Credit: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University) http://hubblesite.org/newscenter/arch... Barnard's Star Proper Motion Credit: Steve Quirk http://commons.wikimedia.org/wiki/Fil... Stellar Deep Field Credit: NASA, ESA and T.M. Brown (STScI) http://hubblesite.org/newscenter/arch... Milky Way and Andromeda Collision Scenario Credit: NASA, ESA, and A. Feild and R. van der Marel (STScI) http://hubblesite.org/newscenter/arch... Milky Way, Andromeda, Triangulum Encounter Visualization Visualization Credit: NASA, ESA, and F. Summers (STScI) Simulation Credit: NASA, ESA, G. Besla (Columbia University), and R. van der Marel (STScI) http://hubblesite.org/newscenter/arch... Music "Stars" Credit: Shamil Elvenheim (CC-BY-NC-SA 3.0) http://freemusicarchive.org/music/Sha... Earth in Hammer-Aitoff Projection Credit: Wikimedia Commons user Strebe http://commons.wikimedia.org/wiki/Fil... Milky Way, Andromeda, Triangulum Encounter Visualization - Hammer-Aitoff Projection Visualization Credit: F. Summers (STScI) Simulation Credit: G. Besla (Columbia University), and R. van der Marel (STScI) Illustrative Sky Views of the Milky Way-Andromeda Collision Credit: NASA, ESA, Z. Levay, R. van der Marel, and G. Bacon (STScI), T. Hallas, and A. Mellinger http://hubblesite.org/newscenter/arch... Andromeda Constellation Credit: A. Fujii (used with permission) http://www.davidmalin.com/fujii/fujii...