It's the cost of it, it costs too much.
In orbit, the telescopes are not hindered by atmospheric turbulence, nor by clouds. But it is especially the turbulence that hinders telescopes on Earth; in outer space, you can get much clearer pictures. Another reason is that not all radiation reaches Earth's surface in significant amounts; for example, most ultraviolet or infrared radiation is absorbed by the atmosphere. Telescopes that detect those must needs be in outer space.
There are several astronomical telescopes in orbit. The most famous is of course the Hubble, but COROT, MOST, and the Swift Gamma-Ray Burst Observer are all visible light telescopes in orbit around Earth, and there's another - Kepler - that doesn't orbit Earth, but does orbit the Sun. There are also a multitude of orbital telescopes that use segments of the electromagnetic spectrum other than visible. Spitzer, for example, uses infrared light (it's another solar orbiter).
Telescopes that work grounded on Earth include optical telescopes, radio telescopes, and infrared telescopes. However, space telescopes, such as the Hubble Space Telescope, do not operate from the Earth's surface. Instead, they are placed in orbit to avoid the Earth's atmosphere, which can distort observations.
All major astronomical telescopes are equipped with spectrographs, including the Hubble and Spitzer Space Telescopes.
The earth's atmosphere doesn't let these rays reach the ground, so the telescopes are placed in orbit where they can receive the rays.
No they are not bigger then radio telescopes at all.
Researchers use all of these: -- optical telescopes -- radio telescopes -- x-ray telescopes -- infra-red telescopes -- ultraviolet telescopes
Telescopes in orbit are not affected by atmospheric turbulence, which can distort images taken by ground-based telescopes. This allows for clearer and sharper images to be captured by telescopes in orbit. Additionally, being above the Earth's atmosphere reduces the amount of light pollution and interference, further improving image quality.
The HST was only launched once, in 1990 .
Some of the best telescopes are in orbit because the earth atmosphere distorts the light from distant stars,which is something scientist and astronomers would rather avoid.
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Earth's atmosphere does not limit a telescope's resolving power.