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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
When was the first telescope invented?
Around 1000AD, the first vision aid was invented (inventor unknown) called a reading stone, which was a glass sphere that was laid on top of the material to be read that to magnified the letters.
Around 1284 in Italy, Salvino D'Armate is credited with inventing the first wearable eye glasses. This picture is a reproduction copied from an original pair of eye glasses dating back to the mid-1400's.
The magnification (MA) equals the focal length of the objective lens (fo) divided by the focal length of the eyepiece (fe), which is this: MA = fo / fe = 10 feet / .25 inches = 120 inches / .25 inches = 480 A link to the Wikipedia article on magnification is included.
The earliest evidence of telescopes were refracting telescopes from the Netherlands in 1608. Their development is credited to three individuals: Hans Lippershey and Zacharias Janssen, who were spectacle makers in Middelburg, and Jacob Metius of Alkmaar.
Hans Lippershey invented the telescope, sometime before 1608 A.D. (which is the earliest record of him applying for a patent). Jacob Metius applied for a similar patent only a few weeks later.
Galileo greatly improved upon these designs the following year, using improved optics. He did not invent the telescope, but he was both the first person to use it and also improve the telescope. It was the astronomical observations recorded by Galileo in 1610 (including the discovery that Jupiter has moons of its own) that is most closely associated with the first use of the telescope.
What brand and power of scope did JC Higgins sell with the Model 31 583.75?
weaver was the vender but the model was sold as JC Higgins it was a 4 power scope known as JC Higgins marksman both the scope and the mount were unique to the model 31 rifle 583 75 was Made by High Standard manufacturing in 1952 Both the rifle and scope were sold only by Sears & Roebuck and exclusive to them only I see the scope for sale all the time on Ebay they average about 15 to 25 bucks .If you by one make sure it works and that it has it scope mount
How do you use a reflector telescope?
The magnification of any reflector telescope is given by the focal length of the mirror divided by the focal length of the eyepiece, so if the mirror's focal length is 1000mm and the eyepiece has a focal length of 10mm, then the magnification is 1000 / 10 or 100 X magnification. So, if you wish to increase the magnification you need to either change the mirror (which is impractical) or change the eyepiece (which is easy) replacing it with an eyepiece with a shorter focal length. So, if the new eyepiece has a focal length of 5mm then the magnification is 1000/5 or 200 X magnification. If you do not wish to buy an expensive complete set of eyepieces, you can buy what is called a Barlow lens which fits between the eyepiece and the telescope. These can increase the magnification by a factor of 2 or 3, but the quality of the image is not so good (as the light has to pass through the Barlow lens as well as the eyepiece). Do not forget that you cannot keep increasing magnification hoping to get better and better images. As you double the magnification, you cut the light entering the telescope by at least a half, so the image is dimmer. Most small telescopes with mirrors between 6 and 8 inches can magnify up to around 100 X effectively but anything more than this will result in the image becoming progressively darker, more grainy and generally not so clear. To get higher magnification you need much bigger mirrors of 10 or 12 inches or more. To add further complications, you will also need a substantial mount for the 'scope as any small vibration at a high magnification will result in a great deal of image shake. Also, you will need a really good motor drive to compensate for the movement of the earth, as, without such a drive at high magnifications, the image will move out of the field of view almost as quickly as you find it due to the earth's motion.
How much is a Wards Western Field 20 gauge shotgun 2 34 inch worth?
The value of a Wards Western Field 20 gauge shotgun can vary depending on its condition, age, and any unique features. Typically, these shotguns range in value from $100 to $300. It's best to have the shotgun appraised by a firearms expert for an accurate assessment of its worth.
What is the maximum power on a Polaris 114 EQ-D telescope?
Depending on optical quality and observing conditions, you can expect to get anywhere from 20x to 50x of useful magnification per inch of aperture. In other words, a 4-inch scope tops out at 200x under ideal conditions, but a 6-inch scope can work well as high as 300x under ideal conditions.
The root tele- means "far" or "across a distance"
e.g. television - to see a picture from a distance, telephone - to speak and hear from a distance, telescope - used to view the solar system from a distance
tele can also refer to a form of skiing called telemark. This type of skiing does not have an attached heel. It is used for downhill skiing or touring.
tele is the german rock/pop band from what is now berlin
"Space" is actually a pretty boring thing to examine, since there's nothing there. What you probably want is to examine things in space, and what kind of telescope is "best" depends on exactly what those things are.
I've added a link to a website intended for newcomers to the hobby that details the sorts of tradeoffs in the various types of (optical) telescopes so that you can choose one that works for what you're interested in looking at.
Why is it possible to eavesdrop without being seen?
Because walls exist that can be hollow enough to hear through, or some can just hear around a corner; because technology exist to hide devices made for listening; because people exist whereas someone listening can get lost in the crowd; and because people aren't always aware of their surroundings, so the one eavesdropping can slip away unseen.
What telescope allows us to see through dust clouds and observe star formation?
The Hubble Space Telescope is able to observe star formation even in the presence of dense dust clouds. It is equipped with instruments that can detect different wavelengths of light, including ultraviolet and infrared, which can penetrate through the dust and provide clear views of star-forming regions. This allows scientists to study and understand the process of star birth in greater detail.
-- The lens must be transparent. The mirror must only be solid.
-- The lens must be perfect through and through. The mirror only needs
a perfect surface.
-- The lens needs two perfectly shaped surfaces. The mirror needs only one.
-- The lens can be supported only around its edge. The mirror can be supported at
as many points across its back as desired.
Arecibo radio telescope is laid out like which optical telescope design?
The Arecibo radio telescope is not laid out like any specific optical telescope design. It is a unique design called an "active spherical reflector" where the dish itself is spherical in shape and fixed in position. This design allows for a large collecting area and a high sensitivity to radio signals.
If telescope mirrors were made in odd sizes the one with the most lightgathering power would be?
the largest odd-sized mirror with the largest surface area. This is because the larger the mirror, the more light it can collect and focus, resulting in increased light-gathering power. The odd size does not directly affect the light-gathering power, but the mirror's surface area is the determining factor.
What makes a telescope more powerful?
Several factors contribute to the power of a telescope. The size of the objective or primary mirror is a crucial factor, as a larger diameter allows the telescope to capture more light. The quality of the optics and the level of precision in their construction also affect the power of a telescope. Additionally, the type and quality of the eyepiece used can further enhance the power by magnifying the image.
Which planet is easiest to spot using a telescope?
The Earth is definitely the #1 easiest.
Next in line would be Venus, Mars, Jupiter, Saturn, and Mercury. Each of those is
visible without a telescope, so you'd know exactly where to point your telescope
by seeing the planet with your eye first.
The brightest planet that you do need a telescope to see is Uranus. So you definitely
won't miss it when you're pointed at it, but you need to know where to point.
Why telescopes that detect non optical radiation are 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.
On what is the SOHO space telescope targeted?
The SOHO space telescope is primarily targeted towards studying the sun. It observes the sun's interior, atmosphere, and solar wind, and helps scientists understand various phenomena such as solar flares, sunspots, and coronal mass ejections. Additionally, SOHO also observes comets, asteroids, and other celestial objects in its field of view.
What is the radio interferometer?
A radio interferometer is a scientific instrument used to observe and study radio waves emitted by celestial objects such as stars, galaxies, and quasars. It consists of multiple radio antennas or dishes that are spread out over a large area and work together to create a combined signal. By combining the signals from different antennas, a radio interferometer can create high-resolution images and precise measurements of radio sources in the universe.
Edwin Hubble lived in the United States. He was born and raised in Marshfield, Missouri, and later moved to Illinois where he attended the University of Chicago and worked at the Mount Wilson Observatory in California.
What do you do on the telescope in shrink ray island?
The numbers on the telescope are the coordinates that will let you see the school Science Room from the apartment window. They are found on the bulletin board are are 87 (left) and 16 (right). Run across the top of the gears to change the numbers.
How do I build a simple telescope?
A simple Galilean telescope consists of a plano convex lens for the objective (front) and a plano concave for the eyepiece. An easy way to make one is to find the optics (lenses) first. You'll need to determine the focal length for the objective, as this will give you an idea of how long the tube needs to be. Once you've obtained your optics, you'll need to make the tube. The simplest method is to simply use two cardboard tubes, one that slides inside the other. The larger tube will hold the objective lens. Make sure that the flat surface of the objective is to the inside of the tube. There are several ways you can fix this into place, such as making cardboard rings or slightly smaller tubes ahead and behind the lens. Next, you'll need to mount the eyepiece into the second "focuser" tube. Again, make sure that the flat side of the lens is facing into the tube, and again you can use the same method used to mount the objective. Once both tubes are finished, you can slide the focuser tube into the main tube. You may need to decrease the inner diameter of the main tube so that the focuser does not sit loose. You can use more cardboard for this, and even felt for an inner layer to help the focuser move. Remember, as with all telescopes, basic safety; never look at the Sun.
What numbers do you set the telescope on poptropica?
The coordinate is on the board with all the papers on it.The coordinate is 87, 16
