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Latest Posts
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By iantaylor2uk · Posted
I’m still not sure that current theory is that space-time infinite. As I understand it, current theory is that the universe started in a Big Bang around 14 billion years ago and is currently expanding. Depending on the amount of mass in the universe, the universe could keep expanding forever, or it could eventually stop expanding and then contract again. Either way, if the universe started at a specific time, I don’t see how the universe can be infinite right now (note I am talking about the observable universe, as science can’t speculate on things that are not observable). -
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Yes, I'm realizing I don't have the overlay now. I don't understand why it isn't enabled by default? I know I've downloaded the images but then I could just never find how they are actually used. That's certainly going to make it easier. -
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Holding off for the moment. I've come to the realisation that I don't use this rig enough to justify spending much on it. Maybe in the new year I will. I still like the Borg 55 mm f/3.9 but can't even begin to justify spending that kind of money.
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Recent Status Updates
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boulderbelly » Cornelius Varley
Hi There!... why was the topic on First light optics closed?· 2 replies
Thanks
David
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Having read Ken Harisson's excellent book Astronomical 'Spectroscopy for Amateurs' at least twice and innumerable visits to Robin's 'Three Hills Observatory' internet site, I have decided to haul myself up on the shoulders of giants and try to make yet another spectrograph this time involving a homemade adjustable slit! After a lot of deliberation I have come up with a modular design based on the 'Watkis Spectrograph'. I am currentlyputting together a heap of parts mostly gleaned from old bits of redundant/broken kit or stuff purchased from the NET in days gone past when I thought 'That's too good an offer to miss' (followed by a long languish in a box in the shed). Each module appears to pass the Transpec V2 spreadsheet test - so fingers crossed. At least I will have a project to keep me going through the winter.· 0 replies
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