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Internet Search Results
telescopes_022507
There are two basic types of telescopes: refractors and reflectors. Both have their advan-tages. Properly outfitted, either will show you distant galaxies, the rings of Saturn, or the craters of the Moon. Refracting Telescopes gather light with a lens, directing it to the eyepiece.
Telescopes - Ken Press
Bigger diameter telescopes are better for fainter objects, and a little more detail. They can support higher magnifications better but only if the atmospheric turbulence is low.
Telescopes
Easier to construct/support big mirrors than big lenses, so most big telescopes are reflecting telescopes. The full optical properties of a telescope depend on the properties of the primary, the secondary, and all the details of the camera/spectrograph which gets placed at focus.
Introduction to Telescopes in Astronomy - University of Aberdeen
Telescopes were initially developed for military and maritime use and were quickly adapted for celestial observation triggering the birth of modern observational astronomy that fundamentally transformed our understanding of the Universe.
Astronomical Optics 2. Fundamentals of Telescopes designs 2.1 ...
A telescope must bend or reflect light rays to make them converge to a small (ideally smaller that the atmospheric seeing size for ground telescopes) zone in the focal plane
telescopes - Department of Astrophysical Sciences
Purpose of a telescope. • Gather light from faint objects, • Light-gathering power depends on areaof lens or mirror, so proportional to d2. Why? • Resolve small details. • Smallest angular size that can be resolved is proportional to 1/d. • -> Bigger is better. Light Gathering Power. Little telescope Big telescope. (same exposure time)
TELESCOPES
The history of the development of astronomical telescopes is about how new technologies have been applied to improve the efficiency of these three basic components: the telescopes, the wavelength-sorting device, and the detectors. Let’s first look at the development of the telescope.
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