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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
Captin cook was using a telescope to watch this cross the path of sun?
Captain Cook was using a telescope to observe the transit of Venus across the path of the Sun. This event occurs when Venus passes directly between Earth and the Sun, appearing as a small dot moving across the Sun's surface. It is an important event in astronomy for determining the scale of the solar system.
Who first used a telescope to study astronomy?
Galileo was the first to use the telescope for astronomical observation.
Galileo based his telescopes on ones he saw Dutch sailers on trading ships using. So you have to go back to the Netherlands to find earlier telescope makers/users. It is likely the Dutch may have adapted the idea from someone else before them.
Where did Galileo invent the telescope?
Galileo didn't actually invent the telescope, though he was one of the first to use it for astronomical observations. At the time he constructed his first telescopes, he was teaching at the University of Padua in Italy.
The first person to use a telescope for astronomical observation was?
The first person to use a telescope for astronomical observation was Galileo Galilei in the early 17th century. He made groundbreaking discoveries, such as the moons of Jupiter and the phases of Venus, using his telescope.
Why do eclipses only last a few minutes?
First note that there are 2 sorts of eclipse, Solar eclipses (when the Moon gets between Earth and the Sun) and Lunar eclipses (when the Earth gets between the Moon and the Sun). Solar eclipses only last for a few minutes, while Lunar eclipses last an hour or more.
During a total Solar eclipse, the Moon's umbra (shadow) moves rapidly from west to east across the Earth. The Earth is also rotating from west to east, but the umbra always moves faster than any given point on the Earth's surface, so it almost always appears to move in a roughly west-east direction across a map of the Earth.
Thus while shadow of the Moon may be on the earth for several hours, the speed at which the moon's shadow moves across the earth is equal to the speed of the moon traveling along its orbit, minus the speed of the earth's rotation.
The speed of the shadow at the equator is about 1706 km/hr (about 1060 mph); near the poles, where the speed of rotation is virtually zero, it is about 3380 km/hr (about 2100 mph). The width of the track of a total eclipse varies according to the relative apparent diameters of the Sun and Moon and in the most favorable circumstances, when a total eclipse occurs very close to perigee, the track can be over 250 km wide.
Thus at a point on the path of a total solar eclipse, the time of totality can be calculated from the size of the moon's shadow and from its speed and when you go to see a total eclipse you place yourself on the ground to intersect the track.
Therefore your time in totality depends on how big the shadow is as it passes over you and about the maximum time you can get in totality is about 7 minutes (a 250 km shadow traveling at 1706 km/hour), but these eclipses are very rare and usually the duration of totality is much shorter.
When will alphalpha be decommisioned?
the hubble space telescope was launched in 1990.. and will likely be decommissioned in 2012 or 2013
Two types of mirrors found in an astronomical telescope?
Reflecting telescopes are clearer according to scientists. These are the ones with mirrors. You could use a bunch of mirrors and reflect them to the same destination and procure an excellent picture.
What does scope mean in telescope microscope or periscope?
Scope refers to the instrument's ability to view distant objects. In a telescope, scope means the range or extent of vision to observe celestial objects. In a microscope, scope refers to the range or magnification to view tiny objects up close. In a periscope, scope defines the field of vision to see over barriers or around corners.
Distance between two radio telescopes?
The distance between two radio telescopes is important for interferometry, a technique used to combine signals from multiple telescopes to improve resolution and sensitivity. By measuring the time delay between the signals received at each telescope, scientists can determine the distance between them and use this information to create detailed images of celestial objects.
Why are most modern telescopes reflecting telescopes?
Most modern telescopes are reflecting telescopes because reflecting telescopes are generally more cost-effective and easier to build at larger sizes compared to refracting telescopes. Reflecting telescopes also suffer less from chromatic aberration and can have a simpler design with fewer optical elements.
How many lenses does a telescope have?
A telescope usually has two lenses: the objective lens, which gathers and focuses light, and the eyepiece lens, which magnifies the focused light for viewing. Some telescopes may have additional lenses for specific functions, such as correcting aberrations or enhancing image quality.
What are some space words starting with 'u'?
- Universe - the entirety of space-time, including all matter, energy, planets, stars, galaxies, and the contents of intergalactic space.
- Uranus - the seventh planet from the Sun in our solar system, named after the Greek god of the sky.
- Ultraviolet - a type of electromagnetic radiation with wavelengths shorter than visible light, often found in space and emitted by stars and other celestial bodies.
- Answered by Laura
jst search it in google. lol
1. The aperture of a telescope is several times larger than the aperture of human eye so that the objects that can not be normally seen by unaided eye can be seen. Light- gathering power of a telescope is proportional to the area of its aperture and hence depends on the square of the radius of the mirror. Therefore a 20 cm diameter telescope collects four times more photons than a 10 cm diameter telescope.
2. A telescope can be equipped to record light over a long period of time, by using photographic film or electronic detectors such as photometers or CCD detectors while the eye has no capability to store light. A long-exposure photograph taken through a telescope reveals objects too faint to be seen with the eye, even by looking through the same telescope.
3. A third major advantage of large telescopes is that they have superior resolution, the ability to discern fine detail. Small resolution is good. The resolution is directly proportional to the wavelength being observed and inversely proportional to the diameter of the telescope.
How does the refracting telescope work?
A refracting telescope uses a lens to bend or refract light, focusing it to create an image at the eyepiece. The objective lens captures and bends light to form an image at the focal point, which is then magnified by the eyepiece for observation.
Where did the word telescope come from?
The word "telescope" comes from the Greek words "tele," meaning far, and "skopein," meaning to look or see. So, "telescope" essentially means "far-seeing" or "seeing at a distance."
How is the telescope important to space exploration?
Observing space objects and phenomena, from the ground or from orbit, provides many clues to their characteristics. Since it is not currently possible to visit many locations in space, astronomy can provide insight into the processes at work on planets and stars. In addition to optical viewing and photographs, scientists can examine other non-visible emissions, such as infrared and ultraviolet radiation, x-rays, gamma rays, and neutrinos.
What is the resolving power of a 25Cm telescope?
Resolving power is measured in arc seconds. The formula to find this is as follows:
arc seconds (x) = 11.6/(D)
11.6 is part of the formula
D- is the diameter of the telescope (which you have = 25cm)
Therefore the resolving power should be:
11.6/25 = .46 arc seconds
What do the numbers on a spectroscope represent?
The numbers on a spectroscope represent the wavelengths of light being measured. Each number corresponds to a specific color or frequency of light that is being analyzed by the spectroscope. By measuring the wavelengths, scientists can identify the chemical composition of a substance based on the unique way it interacts with light.
When light travels through the lens of a telescope it is?
focused onto a single point to form an image. This process enables an observer to view distant objects with greater clarity and magnification compared to the naked eye. The quality of the image produced is influenced by the precision and quality of the telescope's optics.
Was Edmund halley the discoverer of Halley's comet?
No, Edmund Halley was not the discoverer of Halley's comet. He predicted the return of the comet, which led to its recognition as a periodic comet and its eventual naming after him. The comet's true discoverer is unknown, as it has been observed and recorded by various cultures throughout history.
What telescope does not use visual light energy?
Radio telescopes and infra-red telescopes operate at longer wavelengths/lower frequencies than visible light.
Ultraviolet telescopes operate at shorter wavelengths/higher frequencies than visible light.
Why are you asking that, I mean really, does it matter if he is black or white, because if you want him to be black, then just ask yourself first, he's a prisoner....
Alright, now he does have a gental soul, but try enjoying the movie instead of thinking about race.........
I would really appreciate it...........
Thanks!
(DUDE this is "Planetary science" not "Fictional movies")
Who built the first telescope?
The first telescopes were developed independently by Hans Lippershey, a Dutch eyeglass maker, and Zacharias Janssen, his colleague, in the early 17th century. Galileo Galilei is also credited with improving upon their design and using the telescope for astronomical observations.
What kind of telescope is the hubble space telescope?
The Hubble Space Telescope, or HST, or just the "Hubble" for most folks, is a Ritchey-Chrétien reflector telescope. It has a primary mirror to reflect and focus the incident light. A link is provided below.
How old was the Telescope Inventor when he made the Telescope?
The Telescope Inventor, Hans Lippershey, was believed to have been in his 40s when he made the telescope around 1608.
