Telescopes

it gather electro magnetic radiation from object in space and concern trites it for better observation

There are several disadvantages to using disk space:

1) Loss of available space as items are saved, which slows down processing speeds.

2) After reaching a certain amount of occupied disk space, you risk a hard drive crash or failure to operate. When there is a disruption a computer will usually reboot and during this process it searches for errors and deletes them. Normally it will replace or repair damaged sectors, but if you are out of space then it will erase the sectors and permantly be unable to reboot. You'll end up with a paper weight. Do no belief a technician if they tell it is not possible. This comes from personal experience and also the manufacturer will confirm this.

The most powerful telescope in the world is called the James Webb Space Telescope (JWST). It is a space-based observatory designed to study the universe in infrared wavelengths.

That is called a Cassegrain. The main mirror is a paraboloid which focusses the light from a star down to a point, then the secondary small mirror is a hyperboloid with one focus that coincides with the focus of the main mirror, and the other focus is behind the main mirror, where the eyepiece is.

This arrangement is common in radio telescopes as a way of reducing radio noise picked up from the 'hot' ground which is at approximately 260 degrees Kelvin or more.

The Hubble Space Telescope is 600km above the Earth's surface.

The Hubble Space Telescope was named after Edwin Hubble. He was not an astronaut.

Edwin Hubble was an astronomer, not an astronaut, who discovered the expansion of the universe.

To see Saturn's rings clearly and with some detail, you would need a telescope with an aperture of at least 70mm. A telescope with a magnification of around 50-100x would provide a good view of Saturn and its rings.

The objective mirror is 5.1 meters (200 inches) in diameter.

A telescope on Earth has two main limitations: the Earth is rotating, and the atmosphere disturbs light from stars.

Once the Hubble is aimed at an object, it is held pointed at the object by on board gyroscopes. There is no obstruction, such as the atmosphere, between the object and the Hubble.

the diameter of the eyepiece, the diameter of the objective, the focal length of the eyepiece or the number of mirrors used to form the image?

Yes, you can see it without one also. To the naked eye, it looks like a fairly bright star. Using a telescope will allow you to see its ring system though.

a cheap refracting telescope with a simple lens system. Chromatic aberration occurs when different colors of light focus at different points, and low light-gathering power could be due to a smaller aperture size.

SAS 2

A dense cold gas cloud in space would not be visible by its own light, but it would block the light from stars behind it. So we could analyze the dark cloud by measuring what colors of light were blocked. So, we would need a visible light telescope and a spectrometer.

A refracting telescope is a type of optical telescope. It was used in astronomical telescopes and spy glasses. Objective lens are used to produce the image.

Spyglass(es)

Salt is not itself a good substrate to build a telescope on. However to get areas of salt on the surface of the land you need very dry conditions and this means that the skys will be mostly cloud free - just what you need to get a view of the stars.

Salt is not itself a good substrate to build a telescope on. However to get areas of salt on the surface of the land you need very dry conditions and this means that the skys will be mostly cloud free - just what you need to get a view of the stars.

it allowed astronomers to see clearer images without distorted or lost colors.

Galileo's telescope initially magnified objects about 20 times. Later improvements allowed him to achieve magnifications of up to 30 times. His advancements in telescope design significantly contributed to astronomical observations and discoveries, such as the moons of Jupiter.

Object that only shine with radio waves and not in the visible spectrum an object hidden by dust that block visible light.

Yes

The Amazon River was not discovered by Galileo using a telescope.

The first telescope to be trained at the sky in about 1610 only had an aperture of about 25 mm. Beside Venus, the Moon and Jupiter there wasn't much that COULD be seen. The optical quality couldn't be very great. To see the four brightest (Galilean) moons of Jupiter was really a feat. Even Saturn came in so poorly that the rings were mistaken for jug handles!

It doesn't have to be big telescopes, there does not even have to be a telescope. It is called an observatory because it is a place where astronomical observations are made. Long before the first telescope was made there were observatories.