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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
The first telescope didn't look exactly like the ones that we see today, but it was improved though by the famous astronomer Galileo. The first one is said to have been made about 500 years ago.
Will you suggest a good still model for science exhibition?
A good still model idea for a science exhibition could be a solar system model showing the relative sizes and distances of planets. This model can be interactive and engaging for visitors of all ages, providing a visual representation of our cosmic neighborhood. You can also incorporate LED lights to represent the Sun and make it more visually appealing.
The speed of light in glass is the reciprocal of the refractive index of the glass or 1/(refractive index). Not all glass is the same: its refractive index can range from less than 1.5 for Pyrex (a borosilicate glass) to more than 1.9 for (impure) flint glass. This means the speed of light in glass can range between 0.52 and 0.68 of its speed in vacuum.
What are modern space facilities tools and equipment used to study the universe?
Modern tools and equipment used to study the universe include optical telescopes, radio telescopes, space telescopes, the electromagnetic spectrum, many branches of science including paleontology, physics, chemistry, biology, etc., computer science and much much more. For more about tools and equipment used in astronomy, see the related links.
What is the shape of the orbits of most members of the solar system?
round but some rounder than others. Every object is in an orbit which is an ellipse. The planets are in orbits which look almost exactly like circles with an offset centre, but some comets and dwarf planets have orbits with a high eccentricity.
Galileo got his idea for building a telescope from?
Galileo got his idea for building a telescope from hearing about a spyglass. He heard about this device from sailors and was inspired to create his own improved version, which eventually led to the invention of the telescope.
Who was the First person to use refracting telescope?
Thomas Harriot (c. 1560 - 2 July 1621) was an English astronomer, mathematician, ethnographer, and translator. Some sources give his surname as Harriott or Hariot or Heriot. He is sometimes credited with the introduction of the potato to Great Britain and Ireland.[1] Harriot was the first person to make a drawing of the Moon through a telescope, on July 26, 1609, over four months before Galileo.[2] After graduating from Oxford University, Harriot traveled to the Americas on expeditions funded by Raleigh, and on his return he worked for the 9th Earl of Northumberland. At the Earl's house, he became a prolific mathematician and astronomer to whom the theory of refraction is attributed.
What is meant by the goldilocks zone?
The definition of the "Goldilocks zone" or "Habitable Zone" from Wikipedia [See Link] is "a region of space where stellar conditions are favorable for life as it is found on Earth".
The habitable zone is not to be confused with the planetary habitability.
The term is derived from the fairy story of Goldilocks and the three bears, where she tries the beds, chairs and porridge and finds only one "Just right".
Some people interpret this as meaning "the only zone (conditions) where life can be found" but this is too limiting. Life forms based on silicon, other chemical reactions etc. may have entirely different Goldilocks Zones
Even on Earth life exists outside of what many users of the term would consider habitable. Animals have been found living in the near boiling waters of hot springs, in deep below freezing waters under the Antarctic ice cap, at the -60oC temperatures of the Antarctic surface, without light in caves, in waters with high concentrations of sulfuric acid, and in the deep sea near "black smokers" or volcanic vents,
Radio telescopes have poor resolving power because?
"Poor" is really a woosy adjective.
If you're willing to express the size of the objective mirror in terms of wavelengths instead of
inches or meters or yards, then a radio telescope and an optical telescope with equal diameters
have equal resolving powers.
The familiar difference in their dimensions is simply the obvious consequence of the difference
in the wavelength of the signals they happen to be looking at. The shortest radio waves are
something like 2,000 times as long as the longest light waves.
Telescopes are placed in space to view distant galaxies primarily to?
Telescopes are placed in space to view distant galaxies primarily to avoid atmospheric distortion and light pollution, which can obscure and affect the quality of observations taken from Earth. Space telescopes also provide a clearer and more stable view of the universe, allowing for more accurate and detailed observations of distant galaxies.
How high above the Earth does the Hubble Space Telescope orbit?
The Hubble Space Telescope orbits approximately 547 kilometers (340 miles) above the surface of the Earth. It travels at a speed of about 27,000 kilometers per hour (17,000 miles per hour), completing a full orbit around the Earth roughly every 97 minutes.
Why have no large refracting telescopes been built since 1900?
Refracting telescopes suffer from chromatic aberration, refracting telescopes have several surfaces to shape and polish, making large glass lenses without interior defects is very difficult, and large glass lenses are more difficult to support than large mirrors.
Which us state has the most telescopes in the world A.Colorado B.Arizona and C. Washington?
Arizona is the US state with the most telescopes. The most famous telescope in AZ is the Large Binocular Telescope.
What is the value of a Western Field telescope?
The value of a Western Field telescope can vary widely depending on factors such as age, condition, and specific model. Generally, they can range from around $50 for older or basic models to several hundred dollars for more advanced or collectible versions. It's recommended to research current market prices and consider the telescope's condition when determining its specific value.
What is the furthest you can see without a telescope?
Saturn is the furthest planet you can see without a telescope. you can also see mercury Venus mars and Jupiter.
Did Hans lipperhey invent the telescope?
Phoenicians cooking on sand discovered glass around 3500 BC, but it took about 5,000 years more for glass to be shaped into a lens for the first telescope. A spectacle maker probably assembled the first telescope. Hans Lippershey (1570-1619) of Holland is often credited with the invention, but he almost certainly was not the first to make one. Lippershey was, however, the first to make the new device widely known.
This planet is home to the Great Red Spot?
The Great Red Spoton Jupiter is a cyclonic storm system, a hurricane three times the size of Earth, that has lasted for hundreds or thousands of years. The storm has changed only slightly since Giovanni Cassini observed it in the 1600s. It has become more circular over time, but probably will remain oval.
The largest cyclonic storm on the planet Jupiter, it has has lasted at least 200 years, and possibly much longer. It is apparently only slowly shrinking in size. The prevailing theory is that eddies in the thick, dense atmosphere are added to the Spot over time. Its towering cloud tops prevent the loss of heat from the underlying layers, and there is no solid surface to diminish it through friction (as occurs with storms on Earth).
The color darkens or fades over time, coinciding with changes in the atmosphere at that latitude.
Mars' appearance from space looks like a bright, reddish ball. The physical structures such as the mountains, volcanoes and valleys will look blurry due to dust storms that cover the atmosphere. On Mars itself, it basically looks like a dark, cold and lifeless desert. The temperatures do not exceed melting point. There are currently no water bodies on Mars although it was said that there is ice underground. It contains the Solar System's largest mountain, Olympus Mons, which measures about 27 km above "sea level", covering a base area as big as Arizona. Although it was rumoured that there were Martians living on that planet, none have been discovered and they most likely do not exist.
How are telescopes and microscopes alike and different?
Telescopes and microscopes are both optical instruments that use lenses to magnify and observe objects. They differ in their primary function: telescopes are designed to view objects that are far away, like celestial bodies in space, while microscopes are designed to view objects that are very small, like cells or microorganisms. Additionally, telescopes typically have larger objective lenses or mirrors compared to microscopes.
The resolving power of a telescope is a measure of its?
The resolving power of a telescope is the ability to produce an image in which objects that are close together can be seen separately.
Resolving power is sometimes expressed in terms of the inverse of the minimum angle there must be between two points in order to see them separated.
This minimum angle is proportional to (lambda/d) where d=diameter of objective
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Not intended to improve, just a comment:
Think of resolution and clarity as the telescopes Dots per Inch (DPI).
Low DPI , Poor resolution = blurry TV picture
'Best' DPI= High Definition.
Personally on my LX2080 I get better resolution at lower powers of magnification than very high.
When was the optical telescope invented?
The first optical telescope was invented in the early 17th century. Hans Lippershey, Zacharias Janssen, and Jacob Metius are often credited with its invention around the year 1608.
The angular resolution of a telescope in space above Earth's atmosphere is significantly improved compared to telescopes on the ground. With no atmospheric distortion, the telescope can achieve its diffraction limit, which is determined by the aperture size of the telescope and the wavelength of light. This allows for sharper, higher-resolution images of astronomical objects.
Advantage reflecting telescope over refracting telescope?
Reflecting telescopes are typically more cost-effective to build for larger apertures compared to refracting telescopes due to simpler construction and fewer optical components. Reflecting telescopes do not suffer from chromatic aberration like refracting telescopes, leading to sharper images with better color accuracy. Reflecting telescopes can also be made with larger apertures, allowing for better light-gathering capability and higher resolution for astronomical observations.
Compare reflecting and refracting telescopes?
Reflecting telescopes use mirrors to collect and focus light, while refracting telescopes use lenses. Reflecting telescopes are typically less affected by chromatic aberration, while refracting telescopes can be more prone to this issue. Reflecting telescopes are generally more cost-effective for larger apertures.
