PDF-(READ)-Astronomy Today: Stars and Galaxies: 2

With Astronomy Today Seventh Edition trusted authors Eric Chaisson and Steve McMillan communicate their excitement about astronomy and awaken you to the universe around you The text emphasizes critical thinking and visualization and it focuses on the process of scientific discovery making how we know what we know an integral part of the text The revised edition has been thoroughly updated with the latest astronomical discoveries and theories and it has been streamlined to keep you focused on the essentials and to develop an understanding of the big picture Note Astronomy Today Volume 2 Stars and Galaxies 7e focuses primarily on stars and stellar evolution for a 1term course and includes Chapters 15 and 1628 of the main textThis is the standalone book if you want the bookaccess card order the ISBN below 0321718658 9780321718655 Astronomy Today Volume 2 Stars and Galaxies with MasteringAstronomy Package consists of 0321705998 9780321705990 MasteringAstronomy with Pearson eText Student Access Code Card for Astronomy Today 0321718631 9780321718631 Astronomy Today Volume 2 Stars and Galaxies Other Alternate Version Astronomy Today Volume 1 The Solar System Seventh EditionFocuses primarily on planetary coverage for a 1term course Includes Chapters 116 28. The Milky Way Galaxy. When you look into the hazy band of light across the sky, you are actually looking at our galaxy from the inside. While an awesome sight, you can only truly begin to see it if you get away from city lights on a moonless night. . H.-W. Rix IMPRS Galaxies Course March 11, 2011. Goal:. Determine . n. *. (M. *. ,. t. age. ,[Fe. /H],. R. ). . for a population of galaxies. How many stars of what mass and metallicity . formed when and where in galaxies?. Atoms to Astronomy. 2. Special theory of Relativity. It is a basic property of Nature that:. Velocity of Light in vacuum is constant.. All inertial frames are identical so if two objects are moving with a constant velocity, it is impossible to do any test which allows to measure the velocities in absolute manner.. . Loners. Interactions were once . believed to be unimportant . and rare.. Galaxies were thought to . be . isolated loners. , well . separated from one . another . a. nd scarcely interacting.. Au Contraire!. OUR PLACE IN SPACE. Earth is not special. We do not have any unique place in the Universe. We live on an ordinary rocky planet called Earth, one of nine known planets orbiting an average star called Sun. We are near the edge of a huge collection of stars called the Milky Way Galaxy, which is one galaxy among countless billions of other galaxies spread throughout the observable universe.. Let’s look back at the rotational velocity equation:. v = (M. interior. G/r). 0.5. The rotational velocity is constant at big r values.. What must we conclude?. The mass interior to the orbit is still increasing. Even after the radius r has gone beyond the last of the stars. It must be increasing in order to hold v constant.. Islands of Stars. Our goals for learning. :. How are the lives of galaxies connected with the history of the universe?. What are the three major types of galaxies?. How are galaxies grouped together?. Here’s the Story We’ll Unfold for You…. Hubble’s galaxy classifications: Spirals, . ellipticals. , irregulars. . Structural parts of galaxies: disk, halo, nucleus, bulge. Spiral arms – tracers of star formation. Astronomy. , derived from the Greek words for . star law. , is the scientific study of all objects beyond our world. . Astronomy is not a “stand-alone” science. . It combines areas from a number of other fields, including mathematics, chemistry, geology, biology and physics. . Here’s the Story We’ll Unfold for You…. Hubble’s galaxy classifications: Spirals, . ellipticals. , irregulars. . Structural parts of galaxies: disk, halo, nucleus, bulge. Spiral arms – tracers of star formation. constellations. a. Ancient cultures used . mythology. or everyday items to name constellations. 2. Modern astronomy studies . 88 . constellations. 3. Some constellations are not . visible. all year because Earth revolves around the Sun. Stars 1. Patterns of stars – constellations a. Ancient cultures used mythology or everyday items to name constellations 2. Modern astronomy studies 88 constellations 3. Some constellations are not Stephen Hawking - The Birth of Stars - YouTube. Life Cycle of Stars. Nebula – large cloud of gas and dust spread out in an immense volume. Life Cycle of Stars. Gravity pulls gas and dust together in the densest part of the nebula. Laura . Magrini. INAF- . Osservatorio. . Astrofisico. di . Arcetri. In Our Galaxy. Open clusters (disc population): . Many (~2200 known clusters). . even more new candidates in the inner disc from infrared surveys .