Modern Telescopes in addition to Ancient Skies New Views of the Universe An IU Lifelong Lea
Fabian, Doug, Host has reference to this Academic Journal, PHwiki organized this Journal Modern Telescopes in addition to Ancient Skies New Views of the Universe An IU Lifelong Learning Class Tuesdays, May 10, 17, 24 Size in addition to Scale Surveying the Universe from the Earth to the farthest reaches of the visible Universe
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Galileo Galilei’s “The Phases of the Moon” Image courtesy of Biblioteca Nazionale Florence, Italy Our closest neighbor Visualizing the Earth from Space What do you see Earth Moon Sun Stars Copyright 1980 by DC Comics Inc. Welcome to Outer Space!
Earth Radius: 6400 km Distance from Sun: 150,000,000 km 1 AU, 8 light minutes Moon Radius: ¼ Earths radius Distance from Earth: 384,000 km Solar System Sizes of planets NOT to scale Distance to Pluto: about 40 AU (about 320 light minutes) The Nearest Stars The closest star to our Sun is Proxima Centauri, about 4 light years distant.
Most of the stars we see in the sky are within 250 light years Our Sector of the Galaxy The Sun lies along one of our Galaxys spiral arms, known as the Orion Arm View of the Milky Way Galaxy Our Milky Way galaxy contains two hundred billion stars. The Sun is about 26,000 light years from the center.
Our Milky Way Galaxy is part of a small cluster of galaxies. Virgo Supercluster Our Local Group of galaxies is part of a larger supercluster of galaxy groups. Galaxies in addition to clusters of galaxies collect into vast streams, sheets in addition to walls of galaxies.
The Visible Universe On the largest scales, the universe seems to be more or less uni as long as m With thanks to Bill Watterson, 1990 What will we cover How telescopes work Modern telescopes Sky viewing Space telescopes Kirkwood Obs Visiting the Gemini Observatory Future telescopes
Beginnings This sketch of a telescope was included in a letter written by Giovanpattista della Porta in August 1609 Thomas Harriets Drawings of the Moon in addition to Sun Telescopes in addition to how they work from lenses to mirrors
Technology moves as long as ward The 3.5-meter WIYN telescope Kitt Peak, Arizona New Telescope Technology Fast mirror Lightweight mirror Mirror shape controlled Mechanically simpler mount Temperature control
Casting the WIYN Mirror Polishing the WIYN Mirror The WIYN New Technology Dome Compact telescope chamber Open as long as ventilation Insulated to keep cool Heated spaces kept separate
Breaking the cost curve New technology provides better per as long as mance at lower cost WIYN in 6-8 meter telescopes WIYN TECHNOLOGY The importance of image quality text typical ground-based image Hubble image WIYN image The Ring Nebula
Detecting Planets detecting planets directly is hard planets are small in addition to dim planets are near much brighter stars detecting planets directly requires large telescopes (30-meters) in addition to /or special instruments Imaging planets around other stars Brown Dwarf orbiting a star at the same distance as Saturn from our Sun Gemini/Keck AO detection by Michael Liu (IfA), 2002 With a 30-meter telescope we can obtain the spectra of planets around other stars to search as long as the signatures of life Simulation by Sudarsky et al. 2003 Simulation of the spectra of 55 Cancris planets
Fabian, Doug Host
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