Galaxies And The Universe

Galaxies and the Universe. What Are Galaxies? Greek galax = milk William Herschel, 1783 A disk with the Sun slightly off-center. Th Century “Spiral Nebulae” Nearby. Where Are We in our Galaxy? The visible Milky. Galaxies and Globular Clusters. The Milky Way’s Globular Clusters. The Milky Way As We See It. Anatomy of a Galaxy. Spiral Arms. In Microwaves, We Can See the Hub of the Galaxy. Mapping the Neighborhood. Mapping the Galaxy. Not There Yet. The Local Group. Downtown The Virgo Cluster 50 m. l. y. The Local Super-cluster. The Coma Cluster. 350 m. l. y. Large-Scale Structure of the Universe to 500 m. l. y. Travel to the Stars? Kinetic Energy =. Relativity. Speed of Light is Independent of Source Michelson and Morley. Why the Speed of Light is a Speed Limit. Energy of a. Fuel Economy of a Starship. At 0. 1 c, energy is 0. 7% greater than Newtonian formula At. Another Consequence of Relativity- Gravitational Lenses. What Does The Universe Look Like? “The Big Bang”. Edwin Hubble. As Far Out as We Can See - Ten Days With the Hubble Telescope. A New Name for the “Big Bang?”. (Sky and Telescope, 1995). The Big Boot God’s. 90% of the Universe is “Missing”. Outer Stars in Galaxies revolve faster than expected What holds clusters of galaxies together. Astronomers Are Not As Upset As One Might Expect. MACHO’s (Massive Compact Halo Objects) faint stars. Fine Tuning the Universe. Density Much greater and. It just came. Designer? Doesn’t Explain Anything If the Designer can create a Universe. Misinterpreting Relativity. There are no. Where Will It All End? Trillions of years. What Does Cosmology Imply for Philosophy? Nothing At Least.