Telescope | History, Types, & Facts | Britannica
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 objects, even those in the far reaches of the universe.
telescope - Students | Britannica Kids | Homework Help
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 …
Telescope - Reflecting, Astronomy, Optics | Britannica
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).
Telescope - Schmidt, Optics, Astronomy | Britannica
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
Telescope - Light Gathering, Resolution | Britannica
Telescope - Light Gathering, Resolution: 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.
Telescope - Optics, Astronomy, Instrumentation | Britannica
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.
telescope summary | Britannica
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 ).
telescope - Kids | Britannica Kids | Homework Help
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 ...
Hubble Space Telescope (HST) | History, Discoveries, & Facts
5 天之前 · Hubble Space Telescope, the first sophisticated optical observatory placed into Earth’s orbit. Some of its many triumphs included the Hubble Deep Field, a photograph of about 1,500 galaxies revealing galactic evolution, and the discoveries of Hydra and Nix, small moons orbiting the dwarf planet Pluto.
reflecting telescope - Encyclopedia Britannica
In telescope: Reflecting telescopes. 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 name of this type of instrument is derived from… Read More; astronomy