TELESCOPE TOUR. Radio and visible waves can go through Earth’s atmosphere.

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Presentation transcript:

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 Observatory 10 m reflector largest in world

LBT 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 Array Socorro, NM

40 meter radio telescope Green Bank, WV

305 meter Arecibo 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 telescope launched 2003

GLAST- gamma ray telescope proposed launch 2006

Chandra X-ray telescope launched 1999

HUT (HOPKINS UV TELESCOPE) Clumpy universe

Milky Way Visible

Milky Way Radio

Milky Way Gamma rays

Milky Way- X Ray