TELESCOPE TOUR. Radio and visible waves can go through Earth’s atmosphere.
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Transcript of TELESCOPE TOUR. Radio and visible waves can go through Earth’s atmosphere.
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TELESCOPE TOUR
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• Radio and visible waves can go through Earth’s atmosphere
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Mauna Kea Observatory
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Optical telescopes
• Need clear weather
• Away from city lights (light pollution)
• Above clouds (mountain tops)– Less distortion
• Many in AZ and HI
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REFRACTING TELESCOPES
Use multiple lenses to focus light and magnify images.
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The USNO 26-inch Refracting Telescope
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REFLECTING TELESCOPES
Uses a series of mirrors to gather and focus light.
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8” REFLECTOR
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Keck Observatory10 m reflector
largest in world
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LBT2- 8.4 meter mirrors
10x resolution of Hubble
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REFRACTORS VS REFLECTORS
REFRACTORS
•good for observing solar system objects
•See details
•expensive to manufacture (lens, support)
•Chromatic aberration (halo affect;bad)
•Smaller- easy to travel with
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• REFLECTORS
• cheaper to manufacture (mirrors are easier than lenses & mirrors can be supported from behind)
• See farther than refractors– Lose detail
• Can build larger (10 meters vs. 1 meter)
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CATADIOPTRIC TELESCOPES
combines the best features of refractors and reflectors
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Radio telescopes
• Gather incoming radio waves
• Convert waves to colors
• Produce false color images
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Very Large ArraySocorro, NM
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40 meter radio telescope
Green Bank, WV
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305 meterArecibo Radio Telescope
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SUPERNOVA REMNANT
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THE MOON
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A GALAXY
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Advantages of Radio Telescopes
• Use anytime (day, clouds, etc)
• No dome needed
• “see” much farther
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McMath Solar Observatory
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HUBBLE SPACE TELESCOPE
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Advantages of Space Telescopes
• No atm. Interference– See clearer
• NOT CLOSER
• Can detect wavelength
that atm. blocks
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Spitzer infrared telescopelaunched 2003
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GLAST- gamma ray telescopeproposed launch 2006
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Chandra X-ray telescopelaunched 1999
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HUT (HOPKINS UV TELESCOPE)
Clumpy universe
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Milky Way Visible
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Milky Way Radio
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Milky Way Gamma rays
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Milky Way- X Ray
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