Telescopes

Yes the word telescope is a singular noun.

The plural noun is telescopes.

They detect waves coming off of the closest stars

Nov 2 2009 is a full moon

Cause he felt like it :)

A reflecting telescope uses mirrors while refracting telescopes uses lens. The refracting telescope also had chromatic aberration and bad resolution while the reflecting telescope had none of these.

Because It Is Very High And If You Look Through A Telescope There You Can See It Better.

The two types are refractor and reflector.

In a refracting telescope, the light comes in THROUGH a magnifying LENS where it is REFRACTED (bent) to focus the light into an objective lens.

In a reflecting telescope, the light BOUNCES OFF a curved magnifying MIRROR , and then reflected again on a secondary mirror to direct the light into an objective lens.

Among the advantages of a reflecting telescope are that in a refracting lens, the thickness of the lens can absorb some of the light, while a mirror reflects all of the light. Additionally, a reflecting telescope can "fold" the telescope into a much more compact instrument, which is essential with especially large devices. A large refracting telescope would be enormously heavy and cumbersome.

The first telescope was invented in the Netherlands in the early A.D. 1600s. The ancient Greeks were alive between circa the 9th to 6th century before Christ.

A high energy particle telescope is used in astronomy, and is typically found in space observatories. Like most telescopes, it is used to observe celestial bodies

You are receiving that portion of the electromagnetic spectrum that radios use.

It is a much lower frequency than visible light and can detect things that glow at much lower temperatures than stars ... such as gas clouds

Many radio telescopes use the 'hydrogen line' at a wavelength of 21 cm. That is one of hydrogen's spectral lines, corresponding to a transition between two high energy levels in the hydrogen atom.

NASA

space

X-ray telescopes are used to study mainly the Sun, stars and supernovas. X-ray telescopes work better at very high altitudes on the Earth's surface.

"Kepler" is actually an observatory, rather than a telescope. It does, however, operate in space. "Hubble" is a telescope, in the true sense of the word and, again, it operates in space.

we wouldn't know about any other planet besides the sun

a major difference the huble space telescope is in orbit while the regular is in use only on the ground

For "X" it's 87 for "Y" it's 16.

Quality of the Lenses and/or mirrors first. Coatings put on those mirrors/lenses. Telescope design - Refractor, Reflector, Catadioptric (Combination of lenses and mirrors. What do you want to observe in the sky? - Planets? (The highest quality refractor is the best but most expensive. Stars and Nebulae? you want to get a large diameter reflector to gather as much light as possible. Do you want a compromise in design quality choose a catadioptric. You want a good and sturdy mount (one with mass). many telescopes come with computer controls to make set up and locating objects easier. Telescopes and their uses are simple and very to extremely complicated at the same time. Quality = costs money, Quality + bigger size = often exponentially more money and weight The two leading telescope brands are Meade and Celestron. Perhaps if one wants the best compromise of resolution with light gathering capacity and portability at the lowest price you would choose a catadioptric which is probably why these are the most popular selling telescopes. If someone is a beginner they might want to choose a telescope 4" or smaller. intermediate 5" to 8". advanced - 8" to 10" to 20" etc........ There is an "Astronomical" amount of things one could consider in acquiring a telescope and Astronomy is a hobby that can entertain for a lifetime. One can get a very good feel for astronomy and its potential from a good quality 4" or 5" telescope for a beginner and would be a good choice for such at a reasonable price. This would help you decide if you liked astronomy. There is a lot more to learn than is what I stated here but these are good fundamentals. It is often stated that the best telescope is the one that's used the most. Meaning that if you buy a big expensive telescope and have to bring it in and outside it may not get used often, but a smaller one that is easily brought in and out may get a lot more use and satisfaction out of. I am talking with over twenty years experience and I know I will never run out of things to do with my telescopes. Oh, and did you want to take pictures? Sorry that's for another book.

Convex mirrors spread and not focus light. They do the opposite of concentrating and magnifying. They are the mirror image of what a concave telescope is and does. Pun intended.

That's not really how telescopes work. Any telescope can "see" effectively to the light horizon of the universe; the fact that everything there is too dim (from the inverse-square law, and from redshift turning visible light into infrared, and also from just absorption ... over billions of light years, even 1 hydrogen atom per cubic meter adds up) to actually detect is not the telescope's fault.

To increase light-gathering capacity (and thus detect those very dim objects), the larger the scope's diameter, the better. It's easier (read: actually possible) to make large mirrors than it is to make large lenses (they're either too thick in the middle, and therefore absorb too much light, or too thin at the edges, and therefore break). So in that sense, I guess the answer would be reflectors.

However, if you're comparing two scopes of the same aperture that actually exist (no one makes 200-inch refractors, for the reason given above), it doesn't really matter all that much.

No. Many frequencies of light are absorbed by the atmosphere, and so Earth-based telescopes can't detect it. That's why space telescopes such as the Hubble are so valuable; they allow us to see in frequencies that we cannot detect here on Earth.

Because electromagnetic radiation at all wavelengths

travels through vacuum at the same speed.

it gives you rays that help your bones and teeth grow

There is no predicate adjective in that sentence because there is no linking verb. The adjectives are "powerful" and "far away".