teleskoopid
Telescopes, or teleskoopid, are instruments that collect and magnify electromagnetic radiation from distant objects, enabling detailed observations of planets, stars, and galaxies. The simplest designs gather light with a lens (refractor) or a curved mirror (reflector), forming an image magnified by an eyepiece or a sensor. Catadioptric systems use both lenses and mirrors.
Optical teleskoopid are mainly refractors and reflectors. Refractors use lenses and offer high-contrast images with low
Beyond visible light, telescopes observe other wavelengths. Radio telescopes use large dishes to detect radio waves;
Key terms include aperture, focal length, magnification, and resolving power. Mounts are typically alt-azimuth or equatorial,
Historically, telescopes emerged in the early 17th century, with Galileo expanding their astronomical use. Modern facilities
Use ranges from professional research to amateur stargazing. Observing quality depends on light pollution, atmospheric seeing,
Maintenance includes regular collimation for reflectors, careful cleaning of optics, and proper storage to protect components.