by: mark lavery robin alexander. how does a telescope work? galileos telescope
TRANSCRIPT
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The Past the Present and the Future of Telescope
TechnologyBy: Mark Lavery
Robin Alexander
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How Does a Telescope Work?
History of Telescopes
Galileo’s Telescope
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Telescope…a system of lenses, mirrors or both used to gather light from a distant object and form an image.
Telescope…Has three major functions-Gather light-provide resolution-magnification
Introduction….
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Galilean- It consists of a convergent lens as objective ( the lens that forms the image); and its eyepiece (or ocular), placed in front of the focus, is a divergent lensKeplerian - eyepiece, or ocular, is a convex (positive, or convergent) lens placed in back of the focus, the point at which the parallel light rays converge; and the instrument produces an inverted (“real”) image that can be projected or made visible.
Types of Telescopes: Refracting
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Newtonian- The Newtonian reflecting telescope contained a small plane mirror that was angled at 45 degrees. This was inside the prime focus and brought the light to the side of the telescope.
Cassegrain- Permits short tubes relative to the mirror diameter.
Gregorian- The Gregorian version of the telescope contains a concave secondary mirror outside of the prime focus. This helps to reflect the light back through a hole into a primary mirror.
Types of Telescopes: Reflecting
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Largest Refracting Telescope
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Telescope Cartoon
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Telescope Comparison
Newtonian Keplerian
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New Technology Telescopes: What makes them bigger, better, and stronger?
New Technology Telescope La Silla, Chile
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Active Optics
New Technology Telescope, Chile, 1989
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Hubble Telescope
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Hubble Deep Field
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Radio Telescopes
Telescopes Working Outside of the Optical Spectrum
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Infrared and Ultra-Violet Telescope
Telescopes Working Outside of the Optical Spectrum
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X-Ray Telescopes
Telescopes Working Outside of the Optical Spectrum
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Transiting Exoplanet Survey
Telescopes of The Future
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Telescopes of The Future2020: Giant Magellan Telescope
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King, Henry C. The History of the Telescope http://en.wikipedia.org/wiki/Telescope http://en.wikipedia.org/wiki/X-ray_telescope http://www.astro.virginia.edu/class/oconnell/UIT/ http://www.refractortelescopes.co.uk/history.htm http://www.reflectortelescopes.co.uk/guides/a-short-history-of-reflector-
telescopes/http://www.britannica.com/EBchecked/topic/315254/Keplerian-telescopehttp://www.britannica.com/EBchecked/topic/224040/Galilean-telescope
Sources