PPT-Distances of the Stars

Key Ideas Distance is the most important amp most difficult quantity to measure in Astronomy Method of Trigonometric Parallaxes Direct geometric method of finding distances Units of Cosmic Distance. Recap. Canvas homework due Wednesday. Lab this week: Parallax. Overview of the Universe. Solar System, Galaxy, Universe. Largest scales. Expanding Universe. Evidence for a Big Bang. Evidence for an accelerating Universe . PDK Declared Distances. FAA Order 5200.8 . Runway Safety Area Program . states. “All Runway Safety Areas (RSA) at Federally obligated airports shall conform to the standards contained in AC 150/5300-13, Airport Design, to the extent practicable.”. Galaxies . And the Foundation of Modern Cosmology. How are the lives of galaxies connected with the history of the universe?. Hubble Deep Field. Our deepest images of the universe show a great variety of galaxies, some of them billions of light-years away. 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 Introduction. Trigonometric Parallax . Spectroscopic Parallax . Cepheid Variables . Type Ia Supernovae. Tully-Fisher Relationship. Hubble’s ‘Law’ . Trigonometric Parallax. While fundamental, this method is very limited in terms of how far away one can use it. For large numbers of star, ground-based measurements of parallax do not get beyond about 20 pc, although on individual objects this can be extended to about 100 pc (with much effort). . ’ Stars . . Supremely Important. In order to make the most important astrophysical determinations, including. True (intrinsic) brightness. , . mass, . size, . e. tc. …. we . have to . know the distances.. B-V color index way of quantifying this - determining spectral class - using two different filters. one a blue (B) filter that only lets a narrow range of colors or wavelengths through centered on the blue colors, . Spiral Nebulae: . A Huge Challenge!. The . ‘. Great Debate. ’. Curtis . vs. Shapley (. 1920). : . are the nebulae big, . even comparable . to our own Milky Way (as Curtis argued)?. or are they small satellites of the Milky Way (as Shapley maintained). Gautam “G” Kamath. FOCS 2017 Workshop: Frontiers in Distribution Testing. October 14, 2017. Jayadev. Acharya. Cornell. Constantinos. . Daskalakis. MIT. John Wright. MIT. Based on joint works with. An . Astronomical Unit . (AU) is defined as the average distance between the Earth and Sun. . . 1 AU = . 92 955 807 miles . or . 149 597 871 km. AU’s are used to measure distances within the solar system. . 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 What is a Constellation?. A specific group of stars.. Ancient people of many cultures . connected. groups of stars to form patterns, like huge dot-to-dot puzzles.. These . patterns. are known as constellations. . Tip 16 copper skin tonestars 2105-8507SMnBatWebIs50530qxd 7/12/05 1142 AM Page 1Using Your Decorating Bag and Coupler1Screw ring off coupler to expose series of tiny2Force coupler base as far down Declared distances at airports are mechanismby which specific lengths of runway pavement are identified for use in aircraft operations Declared distances are incorporated into the Operations Specific