2025年2月14日 · Telescope, device used to form magnified images of distant objects. The telescope is undoubtedly the most important investigative tool in astronomy. It provides a means of collecting and analyzing radiation from celestial …

telescope, Device that collects light from and magnifies images of distant objects, undoubtedly the most important investigative tool in astronomy. The first telescopes focused visible light by refraction through lens es; later instruments used reflection from curved mirrors ( see optics ).

2025年2月14日 · Telescope - Optics, Astronomy, Instrumentation: Galileo is credited with having developed telescopes for astronomical observation in 1609. While the largest of his instruments was only about 120 cm (47 inches) long and had an objective diameter of 5 cm (2 inches), it was equipped with an eyepiece that provided an upright (i.e., erect) image.

2025年2月14日 · Telescope - Reflecting, Astronomy, Optics: Reflectors are used not only to examine the visible region of the electromagnetic spectrum but also to explore both the shorter- and longer-wavelength regions adjacent to it (i.e., the ultraviolet and the infrared).

The first and most familiar type, however, is the optical telescope, which provides a detailed, magnified image using light in the visible part of the spectrum. Telescopes, sometimes used in pairs called binoculars , are commonly used to observe birds, ships, or …

A telescope is an instrument that allows people to see distant objects. Telescopes are important tools in astronomy, or the study of planets, stars, and other objects in outer space. There are several different types of telescopes. Some, called light telescopes, gather light from objects. Other telescopes gather different kinds of information ...

Telescopes provide a means of collecting and analyzing radiation from celestial objects, even those in the far reaches of the universe. This is a list of astronomical observatories and telescopes ordered alphabetically by location.

A catadioptric telescope design incorporates the best features of both the refractor and the reflector—i.e., it has both reflective and refractive optics. The Schmidt telescope has a spherically shaped primary mirror. Since parallel light rays that are reflected by the centre of a spherical mirror are focused farther away

2025年2月14日 · The most important of all the powers of an optical telescope is its light-gathering power. This capacity is strictly a function of the diameter of the clear objective—that is, the aperture—of the telescope.

Almost as important as the telescope itself are the auxiliary instruments that the astronomer uses to exploit the light received at the focal plane. Examples of such instruments are the camera, spectrograph, photomultiplier tube , charge-coupled device ( …