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Telescopes
A telescope is a device used to form images of distant objects. There are two kinds: an optical telescope uses lenses and is known as a refracting telescope or a refractor, and a reflecting telescope, which uses a mirror and is known as a reflecting telescope or a reflector. The earliest telescope was a refractor built by the Dutch eyeglass maker Hans Lippershey. This category is for questions related to telescopes, including using them to view distant planets and objects in space.
1,887 Questions
Where do you get the telescope in castle crashers?
You must beat the knights king to unlock its powers
How do optical radio telescopes operate?
As far as I know, there is no "optical radio telescope". There are, separately, optical telescopes (which work with visible light), and radio telescopes (which work with radio waves).
Why do astronauts find it difficult to locate extrasolar planets with a telescopes?
Two reasons.
(1) Such planets are very dim, from our point of view. Some of the planets in our own Solar System look roughly as bright as the brightest stars; now imagine them at least 100,000 times farther - that would make them 10 billion times dimmer, from our point of view.
(2) Such planets are very close to their star - once again, from our point of view, i.e., considering the angular distance.
What does ''shut up like a telescope'' mean?
I'd say it means the person saying it is not the brightest star in the sky. The "shut up" part is fairly self-explanatory, but the rest is a little obscure. It sounds like something Biff "make like a tree, and get out of here" Tannen from Back to the Future would say. (The joke there, of course, is that it's supposed to be "make like a tree and leaf/leave".)
Why is the solar nuetrino telescope in South Dakota located 1 mile beneath the earths surface?
Maybe because the neutrinos they are looking for aren't in space. Neutrinos have to be 4,000 feet below the surface to be deciphered between a neutrino and a cosmic ray. Once below 4,000 feet they slow down enough to be detected more accurately. (This information was given to us in a tour by staff at the Homestake Mine in Lead, SD.)
The small mirror is a plane one reflecting a bundle of rays to the side of the main tube. That is a Newtonian reflector.
Did Leonard digges invent the telescope?
About the best that can be said is that if he did, no one took note of it other than his son. It's much more likely that his son was doing a little bit of "My dad is bigger than your dad" type bragging.
How many convex lenses does a refracting telescope have?
At least two, but may have many. Depends on the design of the telescope.
Can creation come from nothing?
No one knows, because no one was a witness to the creation of the Universe. One astronomer said that the chance of a spontaneous creation of everything from nothing is extremely small. But over immeasurable time before the Universe, perhaps just by this small chance, it did happen. Even against the most unlikely odds, it only had to happen once.
What type of telescope is the arecibo telescope?
Arecibo hosts the largest radio telescope in the world, filling a mountain valley in Puerto Rico. Perhaps you saw it pictured in the James Bond movie "Goldeneye".
Why do astronomers continue to build even larger telescopes?
Radio telescopes allow us to see things that can't be seen in visible light. And vice versa, optical telescopes can show things that are not visible in radio telescopes. So, the information from both kinds of telescopes really complements each other.
How does diffraction affect the image produced by a telescope?
Diffraction occurs even in the best telescopes. The appearance of a star should be a dot with any amount of magnification, but under high magnification the star appears as a small disk with circular rings round it. The diameter of the disk does not indicate the size of the star but the size of the telescope's main lens, and a larger lens gives a smaller disk.
Diffraction places a limit on the telescope's ability to separate the images of close double stars. The cloeset double stars can be viewed only with the largest telescopes.
Which tool will a student of astronomy use most a telescope a microscope or a telegraph?
this will be a telescope because a microscope is to look at small things with and a telegraph is basically now a commericial
How does a telescope help you see the stars better?
The way that astronomers learn what elements are present in a given star is by analyzing the light from the star. Different elements have different spectral signatures, and by comparing the light from the stars to the known signatures of the elements, scientists are able to determine which ones are present in the stars.
What are the typical features of a Celestron telescope?
Celestron telescopes are known to be built from lightweight materials, which allows for better mobility than most other brands. Their design is user-friendly and the materials used are considered to be of high quality. In addition their relatively low price makes them a good choice for beginners in the field of astronomy.
What can radio telescopes do that optical telescopes cant?
No. The gain of the antenna ... which translates directly into angular resolution ... depends on the wavelength (frequency) of operation.
The 2.5 meter optical parabolic reflector (telescope) on Mt. Wilson is a titan. 2.5 meter parabolic radio antennas are routinely used in intercity microwave communication but would be quite useless for serious radio-astronomy, as they are such shrimps at radio wavelengths.
Who introduced the idea of a heliocentric model of telescope that uses mirrors?
I believe you are confusing two things here; there is no such thing as a "heliocentric model of telescope". There is a heliocentric model of our Solar System, and there are telescopes. The two are unrelated.
Neither X rays nor radio waves can penetrate the earth's atmosphere?
False. For some bands of radio waves the atmosphere is transparent.
Radio waves can penetrate to the ground. That's why we have radio telescopes on the Earth.
What is the purpose of a telescope mount?
Mounts vary in complexity. A simple mount has the purpose of holding the telescope steady. Fancier mounts can have built in motor drives and even computers to find and track stars as they move across the sky.
