By Martin Peston
This e-book deals a entire introductory advisor to "choosing and using" a sequence LXD55 or LXD75 computer-controlled ("goto") telescope, containing a wealth of worthwhile details for either newbies and extra complex sensible novice astronomers. The manufacturer’s manuals will not be approximately special sufficient to be of actual aid to newcomers. No different ebook deals complicated innovations for more matured LXD sequence users.
Read Online or Download A User's Guide to the Meade LXD55 and LXD75 Telescopes (The Patrick Moore Practical Astronomy Series) PDF
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Additional resources for A User's Guide to the Meade LXD55 and LXD75 Telescopes (The Patrick Moore Practical Astronomy Series)
These templates are freely available from the British Astronomical Association. Youcan produce your own observing template using any word processing package. Alternatively, there are various astronomy computer programs and on-line facilities available on the internet for recording amateur astronomical observations. Their websites are listed in Appendix D. Getting More Information Astronomy resources are vast and cater for all astronomers; from the beginner to the very advanced . You may already have in your collection numerous astronomical materials that you refer to on a regular basis.
GEMs consist of two axes at right angles to each other, which constitute the RA and Dec axes. A set of counter-weights is placed opposite the tube assembly at the other end of the Dec shaft in order to provide a counter-balance. Fixed to each of the axes are round discs with numerical gradations or notches etched on them called Setting Circles. These discs use the RAand Dec coordinate system and are used to locate objects in the night sky. Once the setting circles are calibrated, an object in the sky can be located by simply 'dialing' up its respective coordinates.
26 A User's Guide to the Meade LXD55 and LXD75 Telescopes A disadvantage of a refractor is that the primary objective lens tends to 'dew' up in cold weather thereby reducing the quality of the image. Dew is when tiny water droplets form on the surface ofthe lens. This happens when the lens cools down faster than the surrounding air. Dew shields are used to increase the time before the objective dews up, but electronic heaters are usually more effective at keeping the objective dew free. We will discuss methods for handling dew later in this book.