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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 is a mountain top good for infrared telescopes?
it is becaus water molecules absorb infrared wavelengths. By being placed at the top of a mountain, it will be above the clouds meaning there is less moisture in the air to disrupt the signal.
What type of lens is in the eyepiece of a reflecting telecope?
The eyepiece of a reflecting telescope typically contains a convex lens. This lens helps magnify the focused light that has been reflected off the primary mirror, allowing the observer to see a magnified image of the object being observed.
Why radio telescope is not called radioscope?
The term "radio telescope" is used because it specifically refers to a type of telescope that is designed to detect radio frequencies emitted by celestial objects. The term "radioscope" may cause confusion as it could be interpreted as a device that visualizes radiation in general, not specifically radio waves.
Who invented the first telescope during the Renaissance?
The first telescope is commonly attributed to Hans Lippershey, a Dutch eyeglass maker, who is believed to have applied for a patent for a refracting telescope in 1608. Galileo Galilei made significant improvements to the design shortly after, leading to his astronomical discoveries.
What are 3 types of energy collected by telescopes?
- Visible light: Telescopes collect photons in the visible light spectrum to observe celestial objects.
- Infrared radiation: Telescopes sensitive to infrared radiation detect heat emitted by objects in space that are not visible in the visible light spectrum.
- Radio waves: Radio telescopes capture radio waves emitted by astronomical sources, providing valuable information about the universe.
How many observatories are there in the world?
There are thousands of observatories in the world, ranging from small amateur setups to large professional facilities. The exact number can vary as new observatories are built and existing ones are decommissioned.
What limits the ability of the 5-m telescope at Palomar Observatory to collect starlight?
The Hale Telescope is a 5-m reflecting telescope at the Palomar Observatory. Some factors that limit its ability to collect starlight are light pollution, turbulence in the atmosphere, daylight and clouds.
What is a telescope that uses one or more mirrors?
A telescope that uses one or more mirrors is called a reflecting telescope. Light is collected and focused by the primary mirror, which then reflects it to a secondary mirror that directs it to the eyepiece or detector. This design allows for larger apertures and better image quality compared to refracting telescopes.
Why are so many large optical telescopes located on mountaintops?
The reason we locate optical telescopes in high places is because the earth's atmosphere distorts the light that passes through it. If we can get higher up, there will be less atmospheric distortion of the light from the objects we're observing. Additionally, there is usually less light pollution to affect the images, but relief from atmospheric distortion is the primary reason we go up.
Do mirrors reflect or refract light?
Mirrors reflect light. A mirror's smooth surface allows light to bounce off of it in a predictable manner, resulting in a clear reflection of an object. Refraction of light occurs when light passes through a transparent material and changes speed, causing the light to bend.
What causes chromatic aberration in the objective lens of a telescope?
The most chromatic aberration would occur with a single-lens refractor. However, today most telescopes employ at least two lenses, called achromats. These still incur significant chromatic aberration if the telescope has a short focal length to aperture ratio, called focal ratio. An easy way to determine if the telescope will have significant chromatic aberration is to divide the focal ratio of the telescope by the diameter of the lens in inches. A value of 5 or higher indicates minimal chromatic aberration; 3 to 5 is moderate aberration, and 3 and under is significant chromatic aberration. However, chromatic aberration is generally only obvious on bright stars or planets.
On a clear night how many stars can you see without a telescope?
From : http://www.bigsiteofamazingfacts.com/how-many-stars-can-you-see-in-the-sky
"Of the billions and billions of stars in the heavens, only about 6,000 can be seen from the earth without a telescope. And about a quarter of these 6,000 stars cannot be seen from most lands north of the equator."
Other estimates range anywhere from 2000 to 10,000, depending on where you are and what reference you use.
Which part of a telescope focuses the incoming light?
The list of choices you included with your question doesn't include any part of a
telescope that can do that. I would have picked the objective, whether a lens or
a mirror.
Which planet was first seen by a telescope?
te very ever first person is einstine hoo else nooo im just pulling ur legs i so dont know hooo it is myelf and trying to find out hoo it is like so very very soz bye hope u find the answer to ur question
What invention was made after the Hubble Space Telescope?
The James Webb Space Telescope was developed after the Hubble Space Telescope. It is designed to be the successor to Hubble and will study the universe in infrared wavelengths to help answer fundamental questions about the origins of the cosmos.
Which famous scientist first used a telescope for astronomical observations?
Galileo was probably the first scientist to use a telescope.
Telescopes were invented about 1608 by spectacle makers in the Netherlands. Galileo used one for astronomy the following year.
Galileo .
What are some uses of telescopes?
You use a telescope for looking into space, and looking and stars, planets, moon etc. You could use a telescope as a big binocular. So basically a telescope is used to look at things which are really far away.
Telescopes are used for many things:
Study space
Scientific experiments
Observation
War
Hobbies
Equipment for students
they use it to observe stars and to identify new stars.
Why does a larger telescope allow astronomers to see more?
A larger telescope has a greater light-collecting area, which allows it to gather more light from faint objects in space. This increased light-gathering ability improves the telescope's sensitivity and ability to detect fainter objects, providing astronomers with clearer and more detailed images. Additionally, a larger telescope can have higher resolution, allowing for sharper and more detailed observations of celestial objects.
Why are some telescopes placed above earths atmosphere?
They're at high elevation - to escape the atmospheric disturbance caused by natural and man-made heat 'currents'. Shifting heat currents cause images collected by telescopes to distort. Placing them at higher altitudes minimises the effect, so the images are clearer. Additionally, being high up, they're away from towns and cities, which vastly reduces the amount of 'light pollution' created by man-made light sources.
Are they going to retire The Hubble Space Telescope?
Yes, the Hubble Space Telescope is expected to be retired in the mid-2020s. It has been in operation since 1990, and the James Webb Space Telescope will be its successor.
If the solar system is the size of a football field how far would the earth be from the sun?
Well, we have to make some simplifying assumptions here, because the question selected a rectangle for a scaled-down metaphor instead of a circle or disk. Also, there's some uncertainty implied when the question says " ... the solar system is the size of ... ", since wwe really don't know how far the sun's inf'luence extends, so we don't know where the questioner wants to put the outer 'edge' of the solar system.
Let's make these assumptions:
1). Pluto is the farthest planet from the sun that we know of, so we'll say that the solar system is everything inside Pluto's orbit.
2). We'll shrink everything so that Pluto's orbit exactly fits between the goal-posts ... the orbit will be 120 yards in diameter, the orbits of all the other planets fit inside that circle, and the sun is on the 50-yard line.
-- The sun itself is about 1/2 inch across ... about the size of a dime.
-- Mercury, the planet closest to the sun, is never more than 21 inches from it; it speeds around the sun once every 88 days.
-- The earth is a ball a little less than 0.005 inch across. It moves around the sun on a circle that is 9 ft 1 inchacross, taking a year to complete one revolution. The moon stays with the earth, circling it once a month, never more than 0.15 inch away from it.
-- Jupiter, the largest planet, is a ball 0.05 inch across. It circles the sun on a path that fits inside the 23-yard lines on each side, once in each 11.8 years.
What is a curved glass that makes things look closer than they really are?
- Curved glass that makes things look larger or closer is a magnifying glass.
Where is the Kepler telescope today?
Kepler never had a telescope.
All of his breakthrough accomplishments that totally revolutionized human understanding of the observable universe were accomplished with brain, pen, paper, and the notebooks of Tycho Brahe ... who likewise never had a telescope.
Why must astronomers use infrared telescopes to observe the motions of stars around Sgr A?
Studying universe in IR (infrared) wavelength is called infrared astronomy. Because of lot's of parameters such as redshift (for far objects like early galaxies) it is very interesting for modern astronomy and most of future studying in this field will be on these wavelengths.
Next generation of space telescopes (like WEBB) will observe in IR too.
Why is not good to discover space?
There's no air
Also, radiation from the Sun; vast distances; some risk of collision with debris; the massive, very sophisticated engineering needed to get up there in the first place and then to survive and to return safely.
