| |
| |
|
Science Information |
|
Three Types of Telescopes - What are the Advantages
Refractors, Newtonian reflectors and Catadioptricsare the three main types of telescopes. All thesedifferent types have the same purpose, but eachtelescope design does it differently. Collectinglight and bringing it to point of focus so it can bemagnified and examined with an eyepiece is theirgoal. Of the different types of telescopes the refractoris the telescope most people think of when theythink of astronomy. This type of astronomy telescopeis easy to use and reliable due to the simplicityof design. It requires little or no maintenance. Itsgreat for looking at the different types of lunar,planetary, and binary stars. Newtonians are a type of telescope, which is alsoknown as catoptrics. This type is different fromthe other telescopes because it has the lowestper inch of aperture compared to refractors andCatadioptrics, because lenses are more expensiveto produce than mirrors, especially in mediumto large apertures. Newtonians deliver very brightimages and are low in optical aberrations. Catadoptric telescopes are the most popular typeof instrument, with the most modern design,marketed throughout the world in 3 1/2 and largerapertures. Its very good for looking at differentplanetary, lunar, and binary stars. If you like to take photos with your telescope this type ofinstrument is excellent for deep sky observingor astrophotography with fast films or CCD's. Copyright © JJ PERSISTENT PUBLISHING, INC. PERMISSIONS TO REPUBLISH: This article may be republished in its entirety free of charge, electronically or in print, provided it appears with the included copyright and author's resource box with live website links. Jeremy Hier is the Business Manager and Webmaster ofBest Telescope GuidesJeremy Hier is a freelance writer and regular contributer He likes to offer his advice and tips to consumers looking to purchase meade telescopes and celestron telescopes
MORE RESOURCES: Unable to open RSS Feed $XMLfilename with error HTTP ERROR: 404, exiting |
|
|
|
RELATED ARTICLES
Science Fiction by Arthur C Clarke It is difficult to have a discussion with someone about science fiction if they are not familiar with the works of Arthur C Clarke. The concepts are not too awfully difficult to understand and not nearly as complex as reading Issac Asimov for the science fiction novice and anyone can enjoy Mr. Equipment for the Amateur Astronomer - Part 1 Binoculars and telescopes and other astronomy equipment and accessories are the meat and potatoes of amateur astronomy. A good pair of binoculars is what introduced me to the pleasures of stargazing many moons ago and only after a couple of years scanning the skies did I graduate to a telescope. The Quantum Theory of Holy Languages The quantum theory of holy languages (QTHL) encompasses the three most influential fields of knowledge: science kabbalah, quantum physics and mathematic. Applications of this theory in alternative medicine by use existing human experience has many practical statements. Hominid Inter-breeding 'Kenyanthropus platyops': - Perhaps the 6,000,000 year old men found by a maverick who went behind the authorities back at the Olduvai Gorge will be proven to actually not be outside the australopithecine lineage. But the Leakey family has found a 3. Feb. 12 is Darwin Day -- Secular Americans Celebrate Bday of Evolution Champ This Feb. 12 marks the 196th anniversary of Charles Darwin's birth!The day has special significance for America's nearly 30 million nonreligious people. The Best and Worst of April's Weather If Johannes Kepler, the renowned 17th century astronomer and discoverer of the planetary laws of motion, could speak from the heavenlies, he might have a few words of wisdom to share with the National Weather Service. Although Kepler's name is not normally associated with meteorology, he was quite the weather forecaster in his day. UAVs and The Future Enhancements of Tele-Robotics Today we have already available UAVs, which will soon have the capacity of operating together in swarms, controlled from another nearby aircraft. We have UAVs, which can be flown by a pilot sitting at a desk more than 1000 miles away. UAV Air-Breathing SAM Upgrade Recommendations Can a hybrid Surface to Air Missile, UAV loiter for hours and then become a missile to down an enemy aircraft?Small UAV surface to air missile (SAM), which is air-breathing is a good idea and yields many possibilities to the future of air combat.http://www. Para Trooper Gliders With Angle of Attack Motor or Crank Para Trooper Gliders were very popular in WW II, they were used by both the Axis and Allied Forces. Some of these gliders were huge in size and the Germans had one which had took three bombers to get it off the ground along with two-four rockets used in take off. Traffic Zoology There is a secret zoo that runs encaged along the roads.They are liquid, semi-visible goliaths that rage through the streams and chunks of ordinary traffic, with the effervescent tendrils of mile-long tales whipping behind them like Chinese dragons. Lets Get Dirty There is no right way of saying this, so I'll say it the wrong way: in order to stay healthy we must stay dirty. Now, that didn't sound right, did it? Put it this way: if we all lived in sealed apartments where only the purest air was pumped in and every trace of bacteria were eliminated from our food we probably wouldn't last long when we stepped outside. Military Convoy Artificial Tubes for Safe Travel There appears to be a way to control the safety of an entire convoy of logistical vehicles on a long highway, with no close air support and completely removed from satellite communication or AWACS Surveillance. Let me explain this concept. Issues with Aerial Fire Fighting A few years ago I visited the Wyoming Contractor, which used WWII aircraft to fight such fires. I was amazed that such old aircraft were not in museums but rather in flying condition and used for dropping phoschek on fires. Eugenics and the Future of the Human Species "It is clear that modern medicine has created a serious dilemma .. Robotics Wars If we are having difficulty getting recruits into the army; lets hire some robots? General Patton's famous quote goes "?an army moves on it's stomach" and if you look at the needs of humans to complete a mission they require much in the way of logistical support, where as robots do not, sure some, but much less and we are not just talking about chaplains, psyche councilors, medics, recruiters, human resource personnel and cooks. Any component under the Joint Chiefs is full of a complexity of needs. Locusts To Help Make Energy From Bio Waste, part IV We are in a Plague year 2004-2005 where the locusts are swarming. No one knows how long this will last, but this problem could rage on for several more years. Precognition Shock to Prevent Bullet Strike It is a pretty well known fact and has been proven that the body seems to pre-adjust to changes in advance of events by a second or two. For instance there have been studies of test subjects with finger sensors, which would show the subjects pulse or adrenaline spiked right before they were to be shocked. Embryonic Stem Cell Stem cells are primitive undifferentiated cells that have the capability to form any of the 220 different types of cells in the human body. The embryonic stem cell is found in the embryo and develops into various cells that make a baby. Using High Altitude Blimp Cell Phone Communication By allowing high altitude Satellite Type Balloons or Blimps with Cell Phone type communications we could have a tremendous secondary back-up for communication. Also we could use this high altitude blimp to send out frequencies good for health, such as the Earth's frequency of 7. Enemy UAV Defense is under consideration Unmanned Aerial Vehicles should be shot down from the air rather than the ground because if they are flown tele-robotically the operator who is looking down and forward will not know where the anti-aircraft device is. If the enemy uses Unmanned Aerial Vehicles to draw fire, which is a smart move for them, then once fired upon the Unmanned Aerial Vehicle whether it is shot down or not has now located our weaponry and troops.
|
| home | site map | contact us |