Slide 1 Galaxies-I Slide 2 By the 1700’s the old notion that the Earth was the center of the Universe was overthrown by the success of Newton’s theory of universal gravitation,…

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Slide 1 Two Sightlines toward the Galactic Center with Remarkable H 3 + and CO Spectra Takeshi Oka Department of Astronomy and Astrophysics and Department of Chemistry, The…

Slide 1 Distances Slide 2 Parallax Near objects appear to move more than far objects against a distant horizon. Trigonometric parallax is used to measure distance to near…

Slide 1 2 vi 2006Bethe Centenary Cornell1 The Future of High Energy Astrophysics Extreme Physics in an Expanding Universe Roger Blandford KIPAC Stanford Hans Bethe Centenary,…

Les Pulsars gamma avec GLAST David Smith Centre d’Etudes Nucléaires de Bordeaux-Gradignan ( CENBG - in2p3 - CNRS ) Moriond 4 February 2009 GeV Galactic Sources with the…

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Galaxies GALAXY - comes from the ancient Greeks and their word for âmilkâ-galactos GALAXY are large systems of stars and interstellar matter typically containing several…

Galaxies â Island Universes Hereâs the Story Weâll Unfold for You⦠Hubbleâs galaxy classifications: Spirals, ellipticals, irregulars. Structural parts of galaxies:…