Telescopes

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.

Because the Hubble Space Telescope was designed for periodic servicing, the items to be replaced are easily accessible. Ranging in size from a shoebox to a telephone booth, most of these items can be removed or installed using special wrenches and power tools.

Through a telescope on Earth, you can see the rings of Saturn, which are the most prominent and easily observable. Depending on the telescope's size and quality, you may also discern some details of the rings, such as the Cassini Division, which is a gap between the A and B rings. Other gas giants like Jupiter and Uranus have faint rings that are much harder to see. In summary, Saturn is the only planet with rings that are clearly visible through telescopes from Earth.

Hubble

Yes, that is correct.

The primary goal of an optic is to gather light and recreate a crisp image. The reason for a large primary objective is to gather as much light as possible to see increasingly more distant objects. Crisp, highly detailed images come from what is called intferometry. This technique takes the output from multiple telescopes great distances apart and passes the data through a supercomputer that combines the image. Intferometers create what's called a "virtual telescope" whose resolution is comparable to that of a real telescope the size of the distance between the actual optics.

The Cassegrain reflector is a folded optics design, using two mirrors to fold the light path back on itself. This increases the focal length of the telescope, without increasing it's length. By doing so you can compact a more powerful telescope into a smaller frame, which has advantages for small amateur scopes (portability) and large professional ones (reduced cost).

First developed in 1672 by Laurent Cassegrain, this reflector is a combination of a primary concave mirror and a secondary convex mirror, both aligned symmetrically about the optical axis. The primary mirror usually contains a hole in the centre thus permitting the light to reach an eyepiece, a camera, or a light detector. The primary mirror is parabolic while the secondary mirror is hyperbolic.

Of the three basic types of telescopes: refractors, reflectors and catadioptrics, the Cassegrain reflector falls under the categories of reflecting and Catadioptric designs.

It was called a "Spyglass". Or, it was also called a telescope.

A telescope has a larger gathering area (the main lens, or the main mirror) than the human eye. This makes it possible to see the light of fainter objects. Another thing the telescope does is to increase angular resolution. This makes it possible, in some cases, to see two stars that are close together as two stars, whereas the human eye would see them as a single spot of light.

Our sun is the biggest object in our solar system.

Compared with some suns/stars in other solar systems, it would still be small-ish.

The "sun" or star should always be the largest object in any solarsystem.

It has got such large a mass that gravity alone is enough to "ignite" it and cause it to "burn". Not actually "burning" as in the reaction of fire as in wood and air (oxygen) but a fusion process between atoms of helium and a fission process of heavier atoms (Radioactive material) of which causes so much heat that it would appear to be intensly "burning".

It depends a bit how we define a "thing". If we concider the void between planets or the void in a solar system to be a "thing", a thing of almost nothingness, then this would be by far the biggest.

cause they gather light and concentrate it.

OH NAH! Telescopes weren't invented back in his time

The magnification of the telescope image is

(focal length of the objective) divided by (focal length of the eyepiece).

The focal length of the objective is fixed.
Decreasing the focal length of the eyepiece increases the magnification of the image.
(But it also makes the image dimmer.)

no it is not possible because it is too far away!=)

A kaleidoscope.

Galileo Galilei worked alone, which was common during his time. He did correspond with other scientists, such as Kepler.

magnify things. Such as a microscope.

IT IS NOT POSSIBLE WITH ANY TELESCOPE, EVEN THE HUBBLE SPACE TELESCOPE !

http://www.rocketroberts.com/astro/flag_on_moon.htm

Go to that link for a detailed, scientific answer as to why we cannot see it. The simple answer is we are way too far away !...........I'm sorry, but I am an astronomy major and the statement that we could not even see it with the hubble telescope is completely untrue. However, the answer is NO, you cannot see it from Earth, even with a powerfull telescope.

because looking through the Earth's atmosphere can distort the incoming light.

One way to retain radiation without reflecting it is by using materials that absorb the radiation instead of reflecting it. This absorption process converts the radiation into heat energy, which is then dissipated through convection or conduction. Materials such as lead, concrete, or water are commonly used to retain radiation in various applications like shielding in nuclear facilities or medical imaging.

infra-red telescope is a telescope in which you can look at everything in the waves of infra-red.

Telescopes use various methods to investigate space, including optical, radio, infrared, ultraviolet, and X-ray observations. Each type of telescope is designed to detect specific wavelengths of light, allowing astronomers to study different phenomena, such as the composition of celestial bodies, the behavior of distant galaxies, and cosmic events like supernovae. Additionally, space-based telescopes avoid Earth's atmosphere, providing clearer images and enabling observations of faint objects in the universe. Advanced technologies, like adaptive optics and spectroscopy, further enhance the capabilities of telescopes in exploring the cosmos.

Neptune is the only planet (including all dwarf planets) in our Solar System that cannot be seen with the naked eye. [See related question]

Even with a telescope, it is difficult to see.