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Subject: Knowing the Night Sky Sent: Thursday, June 14, 2001 10:26:00 From: berg@ans.net (Kevin Berg) This is just a little commentary on the use of GoTo scopes versus manual slewing and the use of star charts/computer software, to assist one in knowing the night sky. As a first scope, I've had an ETX-90/EC since March 1999, and it has proven to be one of the best purchases I have ever made for both portability and viewing (given MY expectations from its aperture). Of course, both the technical and non-technical support provided by Mike's web site has made it an even better purchase. In fact, I have been so satisfied by the scope's performance, the support and information offered by Mike's site, and the hobby in general that I have recently purchased a SkyQuest XT10 (10" Dobsonian) from Orion to hunt down those fainter deep sky objects. As most of you may know, a Dobsonian is an excellent choice of scope for viewing deep sky objects in particular. And you also may know that Dobsonian scopes don't include GoTo capabilities like the infamous ETX/Autostar combo, although manual GoTo devices using encoders (i.e., digital setting circles) and drive mechanisms starting at $400 and up are certainly available for Dobsonians. Let me first say that I will NEVER let go of my ETX and its GoTo capability/portability, and have learned quite a bit about the night sky using it, but I've also learned that I have become somewhat dependent on its ability to find objects, and realize that, at least for myself, I will never attain the level of knowledge the night sky has to offer in terms of knowing where objects are until I am FORCED to find them myself. This approach (thru star-hopping) may not be for everybody, but for those willing to take on the challenge, I believe it is one that, with time and patience, will provide a wealth of night sky knowledge. You might be wondering why I am writing about manual slewing and star-hopping, being that this site has so much support concerning the use of the GoTo capability of ETX scopes. The answer lies in those situations where something goes wrong (or could go much better) and the problem is associated with that GoTo feature, like improper alignment, battery/power failure, some form of mechanical/slewing problem, software glitch and/or something else that affects or disables that GoTo funtionality. It's at that time when, instead of calling it a night (especially when it seems like you've waited an eternity for good weather, right?), you can rely on your star-hopping techniques to get you through the observing session. Let's face it, if all else fails, you can at least use a binocular and/or your own two eyes to hunt down even relatively faint objects - or can you? Well, not unless you have a certain level of ability in knowing the night sky. So, if you're like me, you might want to do yourself a favor when you can and practice a manual GoTo method, by using (1) a non-GoTo scope like a Dobsonian (if you have access to or can afford one), (2) the setting circles on the ETX, (3) a binocular, or (4) your own two eyes, all of these with a decent star chart. Perhaps you could practice one of these options when your ETX is working just fine, in order to LEARN THOSE CONSTELLATIONS; In fact, you don't even have to LEARN the constellations first - just learn how to star-hop, and learning the constellations becomes inherent in that task. I think you'll be glad you did WHEN you do have that GoTo "problem", and Murphy's Law says that in time, you will. Even if you were able to somehow escape Murphy's Law, you would still be satisfied by knowing the night sky a LOT better than you did before. I'm hoping for the day when I can confidently say that I don't require the GoTo feature to find deep sky (or any other) objects. Again, I believe that with time and patience, that day won't be far off. Hats off to you folks with ETX's WITHOUT the Autostar, and any other non-GoTo scope owner. Finally, let me close by saying that for those who choose to rely strictly on the GoTo feature to find objects, that's perfectly fine, because that's what it's all about - personal choice. However, I also want to personally experience the work it takes and the satisfaction gained by finding objects without that magnificent GoTo feature - and learn the constellations much better by star-hopping. To me, having a GoTo scope AND mastering the star-hopping technique is kind of like getting the best of both worlds. And, to many of us, the thrill of the hunt is just as important (and sometimes more important) than the find. Thanks for listening, Kevin
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