Aug 09

Telescopes are instruments that are invented to view the objects that are at a distance.

These instruments are made up of two lenses that essentially focus the light from distant objects to get a better view of the objects that are at a distance. The construction and working of the them are easy to understand. There are different types of telescopes, though the basic working is the same. The uses and the construction can vary from type to type.

For the users to get a clear picture on the different telescopes, it will be better to go for a review of the various types of them. This will help the beginners in the industry as they are completely ignorant of what all things are happening in the field of telescopes. To be on the safer side a total review will help you with.

Bushnell telescopes are useful for the beginners. They can view the sun, moon and stars with the help of this telescope. They are easy to use and also to install. These telescopes are of superior quality and at the same time, they are very affordable in the case of the price also. There are varieties that can help the beginners in a better way also.

The celestron telescopes are having high performance also. They can get rid of the short comings of the small telescopes. They outweigh all of them in their performance. There are latest versions that come with newer technologies also. They are always under the research and had enough with them.

The Galileo telescopes are mainly useful for the beginners and the medium scale users. They can use this to get a first hand knowledge of them. This will help them to study the working and how to make proper use of them. It is easy to understand the mounting of the telescope and the way it is to be used for each purpose. The locating of objects is also easy with the Galileo telescope.

Hubble telescopes are used to understand the universe in a clearer manner. This can help the users to understand the mysteries of the universe in a more vivid manner. It is again easy to use and view the universe. The experts can work with the them in a much faster way as compared to the novice users.

The telescopes have not a great difference in its working. They are having similar construction and working. The slight changes are due to the difference in the uses that are made with the telescope. Yet most manufactures take care to make the telescope easy for any user to use.

Knowledge on the telescopes are essential to get a basic idea of what all are the different telescopes that are being used. This will give the beginners an idea on what to do when they are trying to get a telescope on their own. This will help them to secure the best one that will help them to serve their purpose.

Steve Hill is a webmaster from Birmingham, he has interests in a number of websites including: stuttering information and telescope reviews

Tags: ,

Jul 30

Galileo Galilee is known as the “father of telescopes” and rightly so.

He is the inventor of the telescope and every telescope made after his invention follows the same principle that he used. Galileo’s telescope was a primitive prototype of the telescopes that are used widely today. However, the principles he used are the very same ones still being used to this day. Galileo’s telescope used two lenses - one concave and one convex - inside a tube-light shaped device. Convex lenses are those lenses whose edges curve inwards and concave lenses are lenses that have outward curves at the edge. The eyepiece in the telescope was constructed with the concave lens. Spy glasses, invented around the same time and used by militants to observe enemy activity in camps, were a major inspiration to Galileo in making his own telescope.

When two lenses are combined together, they are able to collect more light than individual lenses. This is the main principle behind Galileo’s telescope. Most of the telescopes in use today, use the same principle. The human eye also works on a similar principle, but cannot collect too much light. Telescopes are able to gather more light because of the double lenses used in its construction. These lenses gather light and build an image by focusing the light at a point. Refraction is the mechanism in use to form such images. As a result, telescopes are also called refracting telescopes or refractors. The phenomenon by which the collected light bends and forms images is known as refraction.

Images were magnified by a factor of 30 in Galileo’s invention. However, the shape of the lenses he used was such that his image became blurred and distorted. But no one had ever invented something so exciting with which to observe the night skies before Galileo’s telescope. Galileo used his telescope to view the moon and observe it closely. He was also the one to figure out that the magnification factor of a telescope was provided by the ratio of the power of the concave lens to the power of the convex lens. So he premised that the simplest way to increase this magnification factor was to use a high power concave lens with a weaker convex lens.

In Galileo’s time, there were only low strength lenses available. Due to this restriction, Galileo decided to make his own lenses. He was soon able to achieve a magnification of 9x with lenses hat he had ground himself. His telescope was fitted with his own lenses. It was just another feather in his already well-decorated cap.

As time passed, Galileo improvised on his primitive telescope, making several modifications to it. He also demonstrated his invention at the Senate of Venice, and several senators climbed the highest towers of the time to observe the horizon with Galileo’s invention. They viewed the distant ships from their perches and decided that the telescope was a very useful military device.

The telescope changed the face of Astronomy and became an indispensable part of the study. Several inventors used the same principle and made telescopes of their own. Gradually over the years, the study of astronomy benefited immensely from the telescope and its uses. The same principle was employed in the construction of much more powerful telescopes that made it possible to understand our plane and its surroundings more comprehensively, all thanks to Galileo’s wonderful invention.

Discover more about amateurs telescope making as well as insights into astronomy telescopes when you visit http://www.howdotelescopeswork.com, the online resources on how do telescopes work

Article Source: http://EzineArticles.com/?expert=John_B_Mayall

Tags: ,

Jul 29

When Galileo made his telescope, he was far from the expert he became later.

He was just a layman, who found the sky and its stars fascinating and wanted a device that would take him closer to the object of his fascination. It was this desire that led him o devise the first ever telescope that changed the face of history in more ways than we can imagine.

In today’s age, a person is able to buy a telescope, readymade, from the market. But for one who is not experienced, constructing a telescope is akin to an adventure. Although the procedure is complex and technical, and quite long, it is quite possible to make a telescope for oneself, by oneself. For the amateur who holds a keen interest in the telescope and the way it works, constructing it by oneself can be quite adventurous and fulfilling.

The construction itself is not very difficult, and it is made easier if one can enlist the assistance of another person who has himself constructed telescopes earlier. Even someone who is an amateur astronomer would make a good mentor, if it’s no possible to find one experience in telescope construction. Astronomy clubs generally have at least one member who has prior experience of building telescopes, and such people are quite accommodating towards amateurs.

For an amateur, telescope construction can be a cumbersome task. Patience and calm are advisable for a first-timer. The greatest inventions of all time came from blind experiments and unexpected results. When starting out, it is always best to have some references and manuals handy, as they can explain the technical aspects in the clearest ways. A local library is a good source for material to an amateur just starting out in telescope building.

The basic elements of a telescope are the mirror, two lenses, the housing for the whole structure, and materials that will be used for polishing the mirror. These parts can all be bought at local stores or even online. The mirror can be ground at home as well, but is a tiresome process.

The construction of a telescope is a long and drawn out process. Careful planning is required to ensure that there is minimal cleaning up left after all the work is completed. Is advisable to lay out newspapers to ensure clean work as well as to ensure correct placement of all the equipment. Maintain a logbook if possible to keep track of the task completed and the duration of each task. In later stages, the logbook is a good record to refer to understand the tasks completed and how long each task required. Also, it helps one to remember what work has been completed and what remains.

Once the construction is complete, it is quite natural for the amateur to be pleased with himself for the work he has accomplished. It is however, easier to buy a telescope kit from the market instead of purchasing individual component and constructing the whole structure. Assembling a telescope from a kit is easier, takes less time and is a better financial option. Such telescope kits are intended for the amateurs, and not directed at the professionals.

Get free lessons on how to build a telescope as well as professional advice on how to buy a telescope when you visit http://www.howdotelescopeswork.com, the premier portal on how to use telescopes

Tags: , ,

Jul 10

If there were one kind of telescope that was the only kind of telescope worth getting, there would be no market for any others. Yet, there are many different kinds being sold.

This leads to the fact that not all are right for all people. When you are shopping for a telescope, it is wise to consider your particular needs.

The first thing to think about is what you want to look at. For example, the moon is seen best with certain refractor telescopes. Bird watching is also a good hobby for those with refractor telescope. However, if you want to do explorations into the deep sky, refractors are not a good choice.

A Newtonian reflector telescope is a good general telescope, but you would not have much luck using it in daytime situations. The best one for deep sky observation is the 6″-25″ reflector telescope. It is not a good overall telescope, though, and it does not work well for daytime viewing.

One of the best general telescopes is the compound telescope, which uses both lenses and mirrors. It is also good for astrophotography. If you want to record your celestial finds for posterity, taking photos of them just makes sense. Many of the sights you see will never come around again in your lifetime, if ever. Take a picture of the object in the sky and you can share it with your grandkids someday.

There are also accessories that can help you use your telescope for just the purpose you choose. A star diagonal can help you look at an object that is high in the sky without making you hold your body and neck in an uncomfortable position. An erecting prism can bring images right side up if you are looking at daytime objects such as birds.

Another point to consider is where you will be when you view the sky. If you are in the city, you will be faced with overcoming light pollution. Without a dark place to observe from, you need the best telescope for the job. Compound telescopes and refractors are the best. If you have a reflector telescope, it will be overwhelmed by the urban light.

If you live in the suburbs, your landscape is probably somewhat polluted with lights, but less so than in the city. This moderate light can accommodate all types of telescopes equally well. In this case, use other means of deciding which telescope to choose.

If you live out in the country, the skies can get very dark. It would seem that this is a good thing when looking at the night sky. Refractors sometimes do not gather enough light for you to see the objects you want to see, though. Compound and reflectors bring the light into your telescope where you want it.

If you want to choose the best telescope for you, it is important to understand what the options are. You also have to go into it with an idea of what your needs are when it comes to using a telescope. Knowing these two things can help you get one you can enjoy for years.

Gregg Hall is an author living with his 18 year old son in Jensen Beach, Florida. Find more about astronomy as well as telescopes at http://www.nsearch.com