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Results 16 to 23 of 23
Thread: Transit of Venus
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8th June 2012, 10:21 PM #16
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8th June 2012, 11:13 PM #17
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I've often wondered about that, but haven't found the answer. Observatory telescopes I have seen are all truss type designs, I always assumed for weight, but smaller ones tend to be fully enclosed. It seems to me though that the truss would be easier for an amateur to construct at home (that may be naive of me having never done it) but this is the first one I have ever seen done that way. Is there a disadvantage in general to the truss construction? If so, why are the big ones done that way?
PuzzledThe other day I described to my daughter how to find something in the garage by saying "It's right near my big saw". A few minutes later she came back to ask: "Do you mean the black one, the green one, or the blue one?".
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8th June 2012, 11:20 PM #18
The big disadvantage of smaller truss telescopes is stray light, if you live in the city. In the country they are fine. Observatory telescopes are protected from stray light by being remote and/or in an observatory.
This little one (actually 4.5 ") came in a kit which I built, which teaches you about collimation, which I then broke and rebuilt with ply.
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8th June 2012, 11:37 PM #19
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9th June 2012, 09:57 AM #20
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Thanks for the explanations. Makes sense.
The other day I described to my daughter how to find something in the garage by saying "It's right near my big saw". A few minutes later she came back to ask: "Do you mean the black one, the green one, or the blue one?".
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9th June 2012, 04:16 PM #21
I saw Venus in transit again today...
what if the hokey pokey is really what it's all about?
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10th June 2012, 01:59 PM #22
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10th June 2012, 10:42 PM #23
Skwair2rownd
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