Monday,September 25, 2017

Chapter 3: Light and Telescopes, cont'd

• Space telescopes and telescopes in non-visible wavelengths
  • Hubble Space Telescope (HST)
    • Question 1
    • Launched 1990
    • Hubble's extraordinary pictures
      • Eagle nebula, star birth
      • Deep field image
  • James Webb Space Telescope (JWST)
    • first scheduled to be launched in 2013, now scheduled for Oct 2018.
    • 6.5 m segmented mirror mosaic.18 mirror segments, beryllium coated in gold
    • will orbit 1.5 million km from Earth
    • expected to last 5-10 years
  • Kepler Mission satellite
    • Kepler assembled
    • Launched March 2009
    • Orbits the Sun, not the Earth
    • Kepler's first five exoplanets
    • Data on 5 exoplanets
    • exoplanet sizes
    • Based on Kepler data, it is estimated that there are 17 billion Earth-sized planets in our Milky Way galaxy.
  • Earth's atmosphere opacity graph
  • Question 2
  • False color maps
  • Both HST and JWST are mostly optical telescopes, but can detect some UV and IR light
  • Radio Telescopes
    • NGC 4261
    • Cygnus A in: Visible, radio, and X-ray
    • Radio telescopes
    • Green Bank, WV
    • Arecibo in Puerto Rico
      • Arecibo was damaged in the recent hurricanes story
    • Very Large Array (VLA) at Socorro, NM
    • More VLA
    • northern Chile
    • ALMA - group of 66 radio-telescope antennas
    • image from ALMA
    • Allen Telescope Array
    • telescope at ATA
  • Infrared telescopes
    • IR movie or download it: here
    • Hot and cold beverages in IR
    • Spitzer
      • Spitzer before launch
      • Orion Nebula in IR
      • nebula in Cepheus in IR
      • signature of water in an exoplanet's atmosphere
      • signature of water in a solar system that is forming around a new star
      • M82 "cigar galaxy" has IR halo
      • Andromeda galaxy in IR
    • SOFIA = Stratospheric Observatory for Infrared Astronomy
      • SOFIA: modified 747 jet
      • SOFIA drawing
      • Picture of plane
      • Open door
  • UV telespcopes
    • Extreme Ultraviolet Explorer 1992-2000
    • Picture of Cygnus Supernova remnant in UV
    • FUSE = Far UV Spectroscopic Explorer 1999-2007
    • M81 in UV
  • X Ray - Chandra X-ray Observatory
    • Do mirrors work with x-rays?
    • Schematic of Chandra's mirrors
    • Picture of one of Chandra's mirrors
    • Launched 1999
    • A sample image - Eta Carinae in x-ray
    • another view of Eta Carinae
    • streaking galaxy
    • collision of 4 galaxies
    • Sombrero galaxy
• Question 3