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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
Why are telescopes that detect non-optical radiation useful for studying objects in space?
Visible light is a very narrow range of the electromagnetic spectrum. Even audible sound, at the very bottom, is part of this EM spectrum. Radio and other types of 'scopes are designed to 'see' these other ranges, often with surprising results. The space telescope employs more than visible light capabilities, as do many Earth and space-bound telescopes. Looking at Saturn in visible light is quite breath-taking, but in ultra-violet (UV) a remarkable geometric pattern is visible on one of its poles.
What is the size of Lord Rosse's telescope lenses?
Lord Rosse's telescopes actually used mirrors rather than lenses. His four biggest telescopes were 15 inches, 24 inches, 36 inches and 72 inches.
How are the telescopes Keck I and Keck II different from radio telescope?
They are optical telescopes.
How is resolution affected by the size of a telescopes mirror or lens?
The resolution is directly proportional to the diameter of the main mirror or lens. For instance, twice the diameter means twice the resolution.
Does the Vatican have telescopes on Mount Graham in Arizona?
Yes, the Vatican Observatory Research Group operates the Vatican Advanced Technology Telescope, one of the telescopes that is located at the Mount Graham International Observatory in Arizona.
Can a 500mm telescope see stars?
Definitely, a 500-mm (20-inch) telescope is a large instrument because
500 mm is the diameter of the main mirror or lens, so the telescope would be
3-5 metres long. A telescope this size could see faint stars down to a
magnitude of round about 15.
Remember that you don't need any telescope at all to see stars. On a clear night
in a dark place, you can see a few thousand of them with only your eyes.
Can Saturn be seen in a normal telescope?
Saturn is often one of the brightest objects in the night sky, and it can be seen
without a telescope if you know when and where to look. With binoculars or a
low-power telescope, you can begin to glimpse two bulges around its disk, which
more powerful, sophisticated, and expensive equipment reveals as its rings.
What was a challenge Galileo had building the telescope?
Galileo Galilei started to become blind, many people believe it is because he was constantly staring through his magnified glasses. He started getting very blind after a while and was not quite able to create the telescope to its full 'destiny' . Anyway, he was able to finish it before he became entirely blind which is a great achievement.
What is the purpose of a Dobsonian telescope?
The Dobsonian telescope was designed with a large objective diameter to observe very faint deep sky objects. It was originally designed from readily available components to provide a large yet still portable low-cost option for telescope users.
How did telescopes in the middle ages contribute to the general cultural progress of feudal society?
Telescopes made no contribution whatsoever to any society in the Middle Ages,
mainly because there were no telescopes during the Middle Ages.
What is the need to use telescope in spectrometer?
The collimator present in a spectrometer convert the rays from the source to parallel rays .Telescope is used to watch the parallel rays which means for the telescope the object is located at infinity.so that we use telescope.
When did maria mitchell invented the telescope?
She didn't invent the telescope, but she used a telescope to discover a comet.
Sending astronauts allows for hands-on exploration, sample collection, and real-time decision-making, but it is more costly and carries higher risks. Telescopes and space probes offer a safer and more cost-effective way to study the solar system, with the ability to gather large amounts of data over longer periods of time. Each method complements the other, with astronauts providing a human perspective and probes enabling extensive coverage.
Did Sir Isaac Newton invent the first reflective telescope?
Yes Sir Isaac Newton had invented the first reflective telescope, as an alternative to the refracting telescope.
Is it possible to see people by satellite?
Yes. Some photographic and surveillance satellites have cameras that can show individual people walking on the ground. Most satellite pictures are from overhead so you can't see their faces and identify them.
Taking pictures at a lower angle that would show faces is difficult as that increases the length of the path of the light through the atmosphere, which is full of thermal distortions which reduce the quality of the image.
What is 1 discovery for the compton gamma ray?
The discovery of Compton scattering is the phenomenon where incoming gamma rays collide with electrons, resulting in a shift in the gamma ray's wavelength. This discovery helped confirm the wave-particle duality of light and demonstrated the particle nature of light.
When was the first space telescope built by NASA place into orbit?
The Hubble telescope was the first telescope built by NASA and placed into orbit. The original launch for the telescope was delayed because of the disaster seen by the Challenger.
What does SE in a telescope mean?
The term "SE" in a telescope commonly stands for "Special Edition," indicating that the telescope model is a limited or unique version with specific features or enhancements. It could also refer to "Standard Edition," denoting a basic or standard version of the telescope model.
Why do astronomers find it difficult to locate extrasolar planets with telescopes-?
Light from the stars they orbit makes it difficult to see them.
What is example of difference between the Hubble and the Kepler Telescope?
Kepler is more specialized than Hubble. It was purpose-built for a very wide field of view but has smaller optics than Hubble. Kepler is kept focused on a single section of space for years watching for variations in luminosity from stars to indicate the existence of planets orbiting other stars.
Basically put, Hubble is meant for general purpose astronomy, while Kepler is specifically used to find planets.
What astronomical objects can you see well with the Celestron NexStar 6SE Computerized Telescope?
It is a 6-inch Schmidt-Cassegrain reflector telescope and you would be able to see stars down to about 10th magnitude. It would also show an appreciable disc with belts on Jupiter, also Saturn's rings, and it would give a good view of the Orion Nebula, for example.
Why can chicken wire be used as the surface of the radio telescope?
It reflects some of radio waves. Also the gaps don't matter too much. That's because of the nature of the radio waves, particularly the wavelengths.
In fact there is a large range of wavelengths.
For the shorter wavelengths a "dish" type receiver is needed, with no gaps.
