telescope |
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| navigate by keyword : aberration algebra analysis aperture astronomy binocular brightness camera catadioptric chromatic class clouds color constellation constellations corrected correction curve curved distance earth electromagnetic far fly flying focal galilei galileo gamma infrared instrument invention lens light mathematics microscope millimeter mirror monocular moon motions objective observatory optical optics perspicillum photography photon physical physiscs point prismatic radiation radio rainbow rays reflection reflectors refracting refraction remote rotation science see seeing sky spectrum speculum spyglass stars sun synthesis telescope theodolit trigonometry ultraviolet universe wave wavelength |
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| Telescope for viewing the sun or the stars in night. Tourists uses it by some coins |
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