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08-15-2013  |  
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July 2013 guide to the five visible planets Learn more
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Telescope basics

Activities such as astronomy, nature studies and viewing sports mustoften be done from a distance. For various reasons we cannot get closeenough to the subjects to view them in the detail that.

Our eyes are general purpose tools and their resolution is limitted, their magnifying properties are minimal and they are limited in how much light that they can gather. We must use optical devices such as telescopes and binoculars to increase our visual range.

Choosing a Telescope

Selecting a telescope for both astronomy and land viewing sounds attractive,but these applications can work against each other, and your choice willusually be a compromise. However, once you have decided on the telescope's main purpose, choosing one can become much easier.

There are lots of telescopes available on the market, and for the beginner, selecting one can be a bewildering experience. Before buying a telescope it is important to ask yourself some questions ...