PPT-Chapter 13: Taking the Measure of Stars

Stars come in a wide range of temperatures sizes masses and colors The constellation of Orion is a good example of the variety of stars How can we learn about stars Suppose you are an alien with three days to learn everything you can about the human species. 4-H All Stars. Short and Sweet Orientation for Agents. Carol Nansel, Shenandoah Co. 4-H Agent/All Star Liaison. cnansel@vt.edu. Motto: Service. September, 2012.  . Who is or What are 4-H All Stars?. , sizes and motions of stars . Recap. Canvas assignment due Friday. Project. : due . Friday 11/21. Campus . observatory. Emission . and absorption lines. Arise from low density gases, where structure of atoms becomes important. Surveying the Stars. © 2015 Pearson Education, Inc.. 12.1 Properties of Stars. Our goals for learning:. How do we measure stellar luminosities?. How do we measure stellar temperatures?. How do we measure stellar masses?. Soprano I Hence  stars,  you  daz- zle but the sight,   you teach to Soprano II Hence  stars, \r \r \r Alto Hence  stars, hence   stars too  dim of light,  you  daz-  zle  b Key Ideas. Distance is the most important & most difficult quantity to measure in Astronomy. Method of Trigonometric Parallaxes. Direct geometric method of finding distances. Units of Cosmic Distance:. , sizes and motions of stars . Recap. Project. : due Friday 11/21. Campus observatory. Information from . brightnesses. of stars. Brightness depends on: distance, temperature and size. If you know two of these, brightness can be used to give you the third. bellwork. . You . have . 9 . minutes . to do both.. Please . read . and. answer . the 3 following questions:. What is luminosity?. Where does our Sun rank among stars?. How are . color. and . brightness. The Milky Way: Our Home Galaxy. What are the different. components of the Milky Way?. How do we see those components?. What does a map of each component look like from our point of view?. Stars in the Milky Way. Distances:. Parallax Detected!. . The Problem Faced by Astronomers. [cast your mind back to the 1700s and 1800s]. There are . hundreds of thousands . of stars visible through small telescopes. Only a tiny fraction of them will display measureable heliocentric parallax -- and you don’t know which they are!. Short and Sweet Orientation for Agents. Carol Nansel, Shenandoah Co. 4-H Agent/All Star Liaison. cnansel@vt.edu. Motto: Service. September, 2012.  . Who is or What are 4-H All Stars?. An honor/service organization (since 1923). 20.11. 1. Neutron stars. T. he . remains of cores of some massive stars that have become supernovae. .. Cores are . a degenerate gas of mostly neutrons.. So much compression at each stage of core contraction that final radius is . Sam Schonfeld. Advisors: Paola . Testa. and Steve Saar . Contents. Motivation. Cross calibrating solar measurements. Methods: Finding Targets. Tracking targets. Modeling stellar emission. Estimating Signal . 1357911131517192123200L300L400L500L600L700L800L900L1000L1100L1200L1300L1400L1500L1600L1700L925L-1185LCollege CareerReady Range For 6th to 8th Grade760LLexile Measureof the BookThis guide provides the R. Ellis & S. G. Djorgovski. Winter 2011. Class Logistics. All info, lecture notes, useful links, . homeworks. , exams, announcements, etc., will be on the class website:. http://www.astro.caltech.edu/~schenker/ay124.