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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
That's because they wouldn't see anything. There is too much dust interfering with light in that region.
Who was the first astronomer to use parallax?
In 1838 Friedrich Bessel was able to measure the parallax of the nearby star 61 Cygni and thus determine its distance and independenly confirm the fact that the Earth orbits round the Sun.
Why can you see a planet through a telescope if it is not luminous?
The same way you see a rock on the ground at night ... shine a flashlight on it.
That's exactly how we see anything in the solar system ... planets, comets, moons,
asteroids, etc. The sun is the 'flashlight'.
What can the the hubble space telescope do?
The Hubble Space Telescope can capture high-resolution images of celestial objects, make precise measurements of astronomical phenomena, study the atmospheres of planets, and help determine the age and expansion rate of the universe through observations of distant galaxies and supernovae.
Was the telescope created by accident?
The first telescope was invented by Hans Lipperhey , a Dutch lens grinder, in 1609 when he combined two lenses.
What evidence is there that Earth revolves around the Sun?
We can observe nearby stars moving forward and back against the background of distant stars (parallax). Scientific analysis coupled with observations show that the Earth is held in its orbit by the gravitational force of the Sun which is far more massive than the Earth.
Where can one purchase spotting telescopes?
There are many places where one can purchase spotting telescopes. Spotting telescopes can be purchased from most retailers that specialize in telescope products. One may also use online retailers such as Amazon to purchase these telescopes.
Telescopes are not dangerous in normal operation.
A large telescope might hurt you if it fell on you.
What rason could you give for placing an opical telescope into orbit instead of a radio telescope?
I can think of two big reasons right off the top of the bat:
1). Radio signals are influenced by a trip through the atmosphere much less than
optical ones are, so the downside of observing them from the surface is far less.
2). Radio telescopes operate at wavelengths that are perhaps 15,000 times the
wavelengths at which optical instruments do. So for comparable sensitivity and
resolution, a radio telescope has to be 15,000 times the size of an optical one.
Armed with this fact, your average Congressperson is not likely to support the
program to fund a proposed Jansky Space Radio Telescope.
What is the value of a good telescope tripod?
It really depends on what you mean by good. My camera tripod holds a small telescope and it is 'good'. It cost about $200. My telescope tripod holds a 12 inch telescope and the tripod cost about $1500. It has built in GPS. That is 'good' too. But if you go to a mount by a company called Ascension, you can pay over $35,000! That is GOOD!
Why do space telescopes collect more kinds of data then telescopes on earth?
Earth's atmosphere partially blocks or absorbs certain wavelengths of radiation, e.g. UV, gamma rays, X-rays, before they can reach Earth's surface. All these wavelengths contain useful information and a telescope outside (beyond) the atmosphere can make use of them too.
Isaac Newton was credited for building the reflecting telescope in 1668. The reflecting telescope design is now very widely used by amateur and professional astronomers, because the cost per square inch of aperture (diameter, the light gathering power) is less than the other designs.
What is NASA' most famous space telescope?
The Hubble Space Telescope is the most famous and the best working EVER MADE!
State the difference between optical and non-optical telescopes?
Optical measures visible light, Radio measures electromagnetic radiation in that part of the spectrum corresponding to radio waves. Same with X-ray telescopes and x-rays. Optical is the kind you look through.
Are there thermal telescopes today?
Yes they are used in search and rescue helicopters to spot missing persons at night.
How big is the lovell telescope?
The Lovell telescope has a steerable dish of 76.2 m (250 ft) in diameter
Cloudy nights can be warmer than clear nights because clouds trap heat?
Water is active in infrared. So water will capture IR from the ground, and scatter about half of it back to the ground. So it allows for much slower cooling than without the water vapor present. It also does a good job of storing heat, so that also plays a part. As clouds form rain, the energy that it took to make it into vapor needs to find a home, usually making for hot rain. Where the atmosphere is saturated with water vapor (like over the ocean, near the tropics), rain is frequently hot, or at least hotter than ambeint temperature. Only where the dewpoint temperature is significantly lower does cold rain fall. So if precipitation (either rain or snow) is falling, some of this heat also gets radiated to the ground.
What telescope can you see through to see mars?
All telescopes will see Mars. The larger the scope, the more light that will be collected and the better the image will be of mars. With certain filters, you will be able to disseminate the different areas on the planet.
The atmosphere tends to block many of those frequencies.
(It's not so much dry, it's as high as possible.)
