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Large telescopes are needed to collect the weak radiation, coming from faint or very distant sources. The larger the aperture, the brighter the final image will be.
The aperture also has to be much larger than the wave length of the radiation being observed otherwise diffraction will spread the star light out and the image will be blurred not sharp. Radio waves have a very large wave length, so these telescopes are enormous!
The resolving power of a telescope measures how well it can distinguish stars that appear close together. It depends on both the aperture size and the wavelength used.
Aperture=light-gathering area of the telescope.
What else can I help you with?
Why have no large refracting telescopes been built since 1900?
Refracting telescopes suffer from chromatic aberration, refracting telescopes have several surfaces to shape and polish, making large glass lenses without interior defects is very difficult, and large glass lenses are more difficult to support than large mirrors.
What and where are the largest optical telescopes in use today?
The largest optical telescope in use today is the Gran Telescopio Canarias (GTC) located at the Roque de los Muchachos Observatory in La Palma, Canary Islands. It has a primary mirror diameter of 10.4 meters (34 feet). Another large optical telescope is the Keck Observatory in Hawaii with two telescopes, each with a primary mirror diameter of 10 meters (33 feet).
Are telescopes dangerous?
Telescopes are not dangerous in normal operation. A large telescope might hurt you if it fell on you.
Is refracting telescopes bigger then reflecting telescopes?
Not necessarily. Refracting telescopes can be large, but reflecting telescopes can also be quite large and often have larger apertures due to their design. The size of a telescope depends on its purpose and design specifications rather than whether it is refracting or reflecting.
The primary reason for spreading many radio telescopes across a large area and combining the signals at a central station is?
to increase the resolution of the telescope system. By having multiple telescopes spread out, the system can simulate a larger telescope, which allows for more detailed observations of celestial objects. Additionally, this setup improves the sensitivity of the telescope array, enabling it to detect fainter signals.
Why have no large refracting telescopes been built since 1900?
Refracting telescopes suffer from chromatic aberration, refracting telescopes have several surfaces to shape and polish, making large glass lenses without interior defects is very difficult, and large glass lenses are more difficult to support than large mirrors.
What is the main reason for positioning many radio telescopes across a large area?
To produce higher resolution images.
What and where are the largest optical telescopes in use today?
The largest optical telescope in use today is the Gran Telescopio Canarias (GTC) located at the Roque de los Muchachos Observatory in La Palma, Canary Islands. It has a primary mirror diameter of 10.4 meters (34 feet). Another large optical telescope is the Keck Observatory in Hawaii with two telescopes, each with a primary mirror diameter of 10 meters (33 feet).
Reflecting telescopes differ from refracting telescopes in having what?
Two large objective lenses.
Why big telescopes?
Large telescopes have improved resolution over small telescopes and as such can gather clearer images of objects further away.
Are telescopes dangerous?
Telescopes are not dangerous in normal operation. A large telescope might hurt you if it fell on you.
Why are large telescopes made?
to see uranus
Is refracting telescopes bigger then reflecting telescopes?
Not necessarily. Refracting telescopes can be large, but reflecting telescopes can also be quite large and often have larger apertures due to their design. The size of a telescope depends on its purpose and design specifications rather than whether it is refracting or reflecting.
What does a major factor mean?
A major factor is a primary cause, a large reason why something happens.
The primary reason for spreading many radio telescopes across a large area and combining the signals at a central station is?
to increase the resolution of the telescope system. By having multiple telescopes spread out, the system can simulate a larger telescope, which allows for more detailed observations of celestial objects. Additionally, this setup improves the sensitivity of the telescope array, enabling it to detect fainter signals.
Is it more difficult to produce large mirrors for telescopes that have large objective lenses?
false
Do Skywatcher Telescopes sell beginners kits?
Sky-Watcher sells a large variety of telescopes. These telescopes range greatly in price and options. It is a good idea to investigate the various telescopes they offer, many are labeled perfect for beginners.
