Galileo is the first recorded instance of the use of a telescope, though it is well known that he developed the idea for it from a toy that arrived from a traveling merchant.

hand telescopes

monocular

binocular

Dobsonian

rich-field telescope

opera glasses

spy glass

spotting scope

An optical telescope cannot be used during cloudy days. Of course, this assumes that the telescope is located somewhere on the Earth's surface and therefore subject to weather. Since clouds obscure the sky - and any heavenly object otherwise visible - the optical telescope will be unable to see anything. A radio telescope, however, can see through clouds, simply because clouds do not block or cause significant interference to radiowaves reaching the Earth's surface from space.

A radio telescope is a reflecting telescope, and uses a mirror rather than a lens.

Since radio waves are so much longer than light waves, the 'mirror' of a radio

telescope is the 'dish' reflector that focuses radio waves onto its antenna,

located at the prime focus of the dish.

The Yerkes Telescope is the worlds largest telescope that's founded by the University of Chicago.

Good question, but from what I have read/seen no, the hubble only takes pictures of distant celestial phenomena.

Why can't it take pictures of the sun?

Treeton General Store sells them for $12,500

Treeton doesn't sell Telescopes.

Shellton - (~) Telescope $12,500

Tropicton - (~) Telescope $13,000

You can see Saturn with a telescope now; in the northern hemisphere, Saturn rises about midnight and is high in the sky by midnight.

Mainly classification of Satellite is as under

1:Structure

2:Orbit Shape

3:Orbit rotation

4:Orbit Inclination

5:Orbit Height

6:Function

A reflecting telescope only needs one mirror, the primary mirror which will focus incoming light to a single point.

A digital telescope might place the digital recording media directly in front of the reflecting telescope without any additional mirrors (although perhaps some lenses).

For practical purposes though, most optical telescope will have a secondary mirror that will either focus light straight back through a hole in the primary telescope mirror, or to the side of the telescope.

Some telescopes, especially the large ones in observatories will have several mirrors directing the light path to the observer or recording equipment.

There are at least two reasons why identical radio telescopes may be built. A mundane reason would to save money by reusing the same design. But the reason why most identical systems are built (not to say that saving money by reusing the design isn't still a factor in these cases) is to construct a "very long baseline interferometer", a type of multiple telescope system that uses properties of electromagnetic radiation (wave interference) to simulate telescopes with much larger apertures. This method attains the angular resolution of the larger telescope, but not the signal sensitivity.

Reflectors - the main two types being Newtonian and Cassegrainian.

A Galilean Telescope is also an Astronomical Telescope so it is just a subset of Astronomical Telescopes.

reflects stuff

Radios are electronic devices which grab signals and turn them into sound. They are composed of electrical circuits and of the various electrical and electronic components that are needed to make those circuits which in turn make the radio itself work.

One end of a reflecting telescope is the big hole pointed at the star. The other end of the reflecting telescope has a lens called an eyepiece.

Two triangular prisms are used in the design of a periscope to reflect the incoming light rays at 90 degree angles. They are first reflected down periscope, then again towards the eye.

Jupiter and eventually 4 moons whose position relative to Jupiter changed from night to night.