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