Youtor
Telescopes
YOUR LINK HERE:
http://youtube.com/watch?v=eUJZXUCnX2U
Visit our website: http://www.sliderbase.com/ • Free PowerPoint Presentations for teaching and learning • Purpose of telescopes • To do what our eyes cannot • Collect photons (from radio to gamma ray) • Achieve higher resolution • Record the received photons • Images • Spectra • Recording • Rarely are your eyes used • to directly look through • a telescope, even for an • optical telescope! • Types of EM radiation • Astronomers have constructed telescopes that have detected all forms of EM radiation, both visible and non-visible, emitted by objects in space. • Types of astronomers • Radio astronomers • Millimeter astronomers • Sub-millimeter astronomers • Infrared astronomers • Optical astronomers • Ultraviolet astronomers • X-ray astronomers • Gamma ray astronomers
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