Thursday, April 17, 2008

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keck telescope For Your Reading Pleasure
What Are Telescopes?



Telescopes act as windows to the universe. It is with the help of telescopes that we can study the solar system and view the conjunctions of stars. Not just that, the various planets, galaxies, satellites and asteroids that we get to see only in the books and magazines are made more familiar to us via the telescopes. They act as barrier- breaking instruments between the human beings and the outer space. The universe is no more a mystery to us that exists beyond our reach and we owe it all to the telescopes.


The modern day telescopes bring with them a wide array of accessories and it is with the aid of these accessories that it becomes much more easier to successfully put the telescopes into proper use. Let us see what are the important accessories that go well and are a "must-have" for most telescope users: -


Filters- These are very essential for telescope users because they reduce the glare on the eyepiece and scatter the light thereby making it less strenuous for us to view distant objects.


Eyepiece- this is a very important piece of equipment and its absence can render a telescope useless. Eyepieces come in a variety of sizes and if you add more than one eyepiece to your telescopes then you can have the pleasure of viewing even the tiniest and distant objects with clarity.


Mounts- Mounts are the stands for telescopes. It is a mount on which the telescope rests. Since a telescope wont function favorably in vibrations therefore you should ensure that it is placed on a stable mount.


Barlow lens- A Barlow lens helps in the magnification of telescopes. These lenses are available in different sizes and we must be careful in choosing the size that best fits the eyepiece.


There are two main types of telescopes, the refractor (Galileo) telescopes and the reflector (Newton) telescopes. The refractor telescope uses an objective lens that bends the light towards the eyepiece. While the reflector telescope uses a mirror, which collects the light and then directs it towards the eyepiece.


Though both the refractors as well as the reflector telescopes are easily available in the market we should take the following points into consideration before buying a telescope.


Do not get impressed by the magnification of the telescopes. This is because magnification alone is of no use if it just produces large but hazy images.


Aperture- This is the most important factor while deciding on a telescope. Aperture is the opening that collects light so its important to choose a telescope with a larger aperture that will ensure a clearer and a more detailed image quality.


Resolution- This enables the telescopes to produce a more detailed image. So always opt for a telescope, which has a higher resolution. Moreover since resolution is also determined by the aperture, therefore the larger the aperture the better the resolution.


Focal length- The distance between the optical center of the lens or the mirror and the optical center of the eyepiece is known as the focal length. The focal length is what determines the magnification in telescopes. Larger focal lengths imply more magnification.


If we are careful about remembering the above points then it wont take us long to choose a telescope the next time we want to buy one for ourselves.

About the Author


Jason Adams for http://www.telescope-information.com

keck telescope Items For Viewing
Pedometer with Calorie Counter - Black



Pedometer with Calorie Counter - Black

  • Measures distance walked and calories burned
  • Step counter measures up to 99,999 steps
  • Digital clock function
  • HiGlo electroluminescent backlight for easy viewing
  • Includes 2 LR44 batteries



    Nikon Buckmaster Laser600 - Rangefinder ( laser ) 6 x 20 - black



    Nikon Buckmaster Laser600 - Rangefinder ( laser ) 6 x 20 - black
    Marketing description is not available.



    Celestron Car Window Mount for Binoculars



    Celestron Car Window Mount for Binoculars
    The Celestron 93602 Car Window Mount for Binoculars is a great accessory for hunters and outdoors enthusiasts who cover a lot of ground in a day. When you are on the moving from place to place in your car, and you want your binoculars handy at all times, there is no substitute to a car window mount. This mount easily attaches and releases from any car window in your vehicle, providing you with immediate access to our binoculars for quick and convenient spotting.

    What's in the Box
    Celestron 93602 Car Window Mount, quick release plate with 1/4 - 20 thread.



    Celestron Star Pointer Finderscope.



    Celestron Star Pointer Finderscope.
    A 1x, or unit power finderscope designed so you can point the telescope while scanning the sky with both eyes. Finding objects couldn't be easier! A mirror lens projects the image of a LED illuminated pinpoint into the line of sight, providing you with a red dot of light to center on the object you want to view. Something like having a laser pointer that reaches into the sky, it greatly simplifies finding objects. The brightness level is adjustable, and the Star Pointer can be used during daytime observing as well. It's also a handy guide when using binoculars. Attaches to any telescope easily.



    Barska Starwatcher 400x70mm Refractor Telescope w/Tabletop Tripoc & Carry Case



    Barska Starwatcher 400x70mm Refractor Telescope w/Tabletop Tripoc & Carry Case
    Barska 40070, 88x Compact Refractor Telescope, 400mm x 70mm Telescope w/ Table Top Tripod & Carrying Case - AE10100



    Celestron 127EQ PowerSeeker Telescope



    Celestron 127EQ PowerSeeker Telescope
    The Celestron PowerSeeker 127 is a 5" equatorial reflector with a big enough aperture to show clear views of the brighter star clusters, nebulas, and galaxies. Its Newtonian reflector optics give you detailed and sharp views of the Moon and planets without the faint purple haze of chromatic aberration (spurious color) that surrounds every bright object in every refractor scope in this price range. The construction of the optical system has all-glass optical components with high reflectivity aluminum mirror coatings for enhanced image brightness and clarity. The equatorial mount has slow motion controls in both axes, to let you easily track objects across the sky. The Celestron PowerSeeker 127 has a light grasp 329 times that of the sharpest eye. The 1.25" focuser has dual focusing knobs for precise image control with either hand. The large focus knobs are easy to operate, even while wearing gloves or mittens in cold weather. The 4mm eyepiece is right at the scope's usable magnification limit on the rare nights of very good seeing conditions. An optional 6mm or 7mm eyepiece comes closer to providing the highest useful power on a night in/night out basis. By aligning the mount on the north celestial pole, you only need to turn one slow motion control knob to follow planets and stars as they travel across the sky. A counterweight on the opposite side of the mount from the telescope balances the weight of the optical tube and makes it easy to move the scope effortlessly from one part of the sky to another. There are two slow motion control knobs connected to the mount by long flexible cables so they are easy to reach while observing. 0.91 arc seconds Resolution 5 Aperture



    Synthesis Imaging in Radio Astronomy II: Conference Series Volume 180 (Astronomical Society of the Pacific Conference Series, V. 180)



    Synthesis Imaging in Radio Astronomy II: Conference Series Volume 180 (Astronomical Society of the Pacific Conference Series, V. 180)



    keck telescope in the news
    The Keck Telescopes: Nature Is Always Helping Out Science

    Thu, 04 Oct 2007 16:40:05 -0700
    The Keck Telescopes: Nature Is Always Helping Out Science Posted by admin The Keck telescope is found atop Mauna Kea, the highest point in Hawaii. It’s location was selected for the lack of artificial light sources in the nearby vicinity. The night sky at the Keck’s elevation, nearly 14,00, is so pure that it is rivaled in only a few other places on Earth. The Keck is quite accessible to the public as well with a road open to vehicular traffic giving access all the way to the summit. Visit t

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