- The definition of a telescope is an optical instrument that makes far away objects look closer by using a special arrangement of lenses and mirrors.
An optical instrument you use to look at the stars that makes the stars appear closer is an example of a telescope.
A small telescope.
telescope definition by Webster's New World
Origin: Italian telescopio (coined by Galileo, 1611) ; from Modern Latin telescopium ; from Classical Greek tēleskopos, seeing from a distance: see tele- and amp; -scope
- to cause to telescope
- to condense; shorten, as by combining parts, compressing, etc.
telescope definition by American Heritage Dictionary
- An arrangement of lenses or mirrors or both that gathers visible light, permitting direct observation or photographic recording of distant objects.
- Any of various devices, such as a radio telescope, used to detect and observe distant objects by their emission, transmission, reflection, or other interaction with invisible radiation.
- To cause to slide inward or outward in overlapping sections, as the cylindrical sections of a small hand telescope do.
- To make more compact or concise; condense.
Origin: New Latin telescopium or Italian telescopio, both from Greek tēleskopos, far-seeing : tēle-, tele- + skopos, watcher; see spek- in Indo-European roots.
telescope - Cultural Definition
A device used by astronomers to magnify images or collect more light from distant objects by gathering and concentrating radiation. The most familiar kind of telescope is the optical telescope, which collects radiation in the form of visible light. It may work by reflection, with a bowl-shaped mirror at its base, or by refraction, with a system of lenses. Other kinds of telescopes collect other kinds of radiation; there are radio telescopes (which collect radio waves), x-ray telescopes, and infrared telescopes. Radio and optical telescopes may be situated on the Earth, since the Earth's atmosphere allows light and radio waves through but absorbs radiation from several other regions of the electromagnetic spectrum. X-ray telescopes are placed in space.
telescope - Science Definition
- An arrangement of lenses, mirrors, or both that collects visible light, allowing direct observation or photographic recording of distant objects. ♦ A refracting telescope uses lenses to focus light to produce a magnified image. Compound lenses are used to avoid distortions such as spherical and chromatic aberrations. ♦ A reflecting telescope uses mirrors to view celestial objects at high levels of magnification. Most large optical telescopes are reflecting telescopes because very large mirrors, which are necessary to maximize the amount of light received by the telescope, are easier to build than very large lenses.
- Any of various devices, such as a radio telescope, used to detect and observe distant objects by collecting radiation other than visible light.
top: refracting telescope;
bottom: reflecting telescope