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I must admit, the most useful few bucks I ever spent was on a Planisphere. I always take it out with me every time I set up. Just turn it to the current date and time and have a look at what constellations are in a suitable spot. Last night I just looked at Puppis.
Even though I have a GoTo, I still use the Planisphere to check my alignment stars are the ones I think they are (usually I am correct). The biggest advantage of this little piece of technology is that the batteries never go flat, you can easily jump ahead to some time in the future and you never have to download updates!
For the first few months after getting the scope, I just went outside and tried identifying some stars and checked them with the GoTo.
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