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Beyond Our Solar System Lagoon Nebula Earth Science 11th ed. Pages 660-680 Stellar Parallax Stellar Parallax Original Photo Stellar Parallax Six months later Parallax angle • 1 second of arc = 1/3600 of a degree • Closest star is 4.3 light years away • Light year is not a time period, it is a distance – How far light travels in a year – 9.5 trillion kilometers – 5.8 trillion miles 1 Star Colors (time lapse photo) Equal Mass Stars One is twice mass of other Star temperature vs. magnitude Pulsating magnitude 2 Nova Herculis Orion Nebula Horsehead Nebula Dark nebula in Orion Nova Persei Pleiades star cluster has reflection nebula Stellar evolution 3 Low mass star Medium mass star Helix Nebula Closest planetary nebula to our solar system Located in Aquarius Eagle Nebula Supernova 1987A 4 Crab Nebula Veil Nebula Photo taken at Wiltshire, UK observatory • Part of Veil Nebula from Hubble Space Telescope • http://www.astrocruise.com/veil.htm Massive star http://hubblesite.org/gallery/album/ Neutron Star formation • Pulsar movie link here • • http://imgsrc.hubblesite.org/hu/db/1996/22/videos/b/formats/low_mpeg.mpg http://www.solstation.com/x-objects/crab-neb.htm 5 Binary pair of super giant and black hole Great Galaxy in Andromeda Milky Way Typical spiral galaxies 6 Barred spiral galaxy Cluster of galaxies Raisin bread analogy of the expanding universe 7