telescopes portals of discovery. telescope a telescope is an instrument designed to aid the...
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Telescopes
Portals of Discovery
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Telescope
• A telescope is an instrument designed to aid the observation of remote objects by collecting some form of electromagnetic radiation (such as visible light).
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Wavelength
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Wavelength & Frequency
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Wavelength & Frequency
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The Electromagnet Spectrum
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Crab Nebula (In Optical)
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Crab Nebula (In Infrared)
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Crab Nebula (In Radio)
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Crab Nebula (In X-ray)
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Telescopes
• There are many types of telescopes to view in each of the electromagnet spectrums.
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Optical (light) Telescopes
• An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum (although some work in the infrared and ultraviolet).
• They work by employing one or more curved optical elements—usually made from glass—lenses, and/or mirrors to gather light and other electromagnetic radiation to bring that light or radiation to a focal point.
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Anatomy of an Optical Telescope
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Refracting TelescopeThe refracting telescope which uses lenses to form an image.
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Reflecting TelescopeThe reflecting telescope which uses an arrangement of mirrors to form an image.
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Counting the Stars . . . 1, 2, 3
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Light Pollution Hinders Our View
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Keck Observatory (Mauna Kea, Hawaii)
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Keck Observatory (Mauna Kea, Hawaii)
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Lowell Observatory (Flagstaff, Arizona)
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Kitt Peak National Observatory(Tucson, Arizona)
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Radio Telescopes
• Radio telescopes are directional radio antennas used for radio astronomy.
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Radio Telescopes
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Radio Telescopes
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Arecibo (Puerto Rico)
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Arecibo (Puerto Rico)
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Space Observatories
• A space observatory is any instrument in outer space which is used for observation of distant planets, galaxies, and other outer space objects.
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Major Space Observatories
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Hubble Space Telescope
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Chandra X-ray Observatory
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Lunar Telescopes?