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EntropyStar

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EntropyStar last won the day on June 15 2012

EntropyStar had the most liked content!

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About EntropyStar

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    Star Forming

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    In the Dark
  1. Hi, I've returned back to Stargazing after a break of a few years, my first stop was naturally coming back to my favourite haunt (SGL). Over the past couple of months I've noticed this place seems much quieter than I remember it (Circa 2011-2013), what's happened? Looking through the discussions I'm surprised to see such gaps between threads, especially in the Observation section. Has the stargazing flock been shrinking over the past few years? Do we need a bit of BBC magic and a new series on Space to tempt in new observers?
  2. Hi all, thanks for the replies.... Is the focuser square in the tube? Yes it's dead straight in the tube. Although I wonder if my secondary is too close to the primary as I can't see the mirror clips despite it being perfectly centred. I've tried moving the secondary a few mm away/towards the primary and it make next to no difference. The collimation is spot on though, i think just means I'm not getting all 10in of aperture into the EP. It looks a little like the picture on the left but the semi minor axis is much smaller than the major axis, it's a really stretched ellipse of light. It might be my eyes, at my age I should be pushing a 7mm exit pupil quite comfortably though (not sure if that helps/hinders). I've been mainly looking through the 28 mm so will ramp up the mag later and see if it helps. Thanks for the responses.
  3. Hi, Slightly embarrassing question I should probably know better..... My collimation is spot on with my F4.7 Dob (use a combination of cheshire and laser to get everything spot on) and I wondering if i'm missing something: For bright stars such as Vega, Altair etc: Despite achieving perfect focus (visually or in conjunction with a Bahtinov mask), bright stars always look slightly squiffy and I'm wondering if the stars magnitude is the critical factor in all this. Fainter stars (Mag 3+) appear as perfect points of light. Whereas brighter stars I can focus them down to almost a perfect point but when approaching 'perfect' focus the star always develops a very small arc (think of the Wembley Stadium Arch...random I know) along one axis, which too me looks off. It only happens on really bright stars. I'm about to delve into AP soon and know a coma corrector is a must with my scope, but even when centred in the eyepiece I'd expect the bright stars to look like bright symmetrical points as per the fainter ones. Any ideas where I'm going wrong here? Is this the limitation of a reflector telescope? Is it simple physics at play? (ie a facet of wave-particle duality?) For background info I've rechecked collimation and focusing when observing, I've carried out numerous defocused star tests and my defocused star 'light rings' are perfectly uniform. Thanks
  4. Bump.... Anyone still hopping? Or we all cheating with Push/GoTo?
  5. Hey all, been while since I last logged in, how's Stellarium been recently? Any new toys worth downloading for it?
  6. I often find the orientation doesn't quite match up, it's always a few degrees out and depends on the location of the object you're aiming for, on the whole though it's 'roughly' the right way up
  7. Sorry I missed this!! I'm really glad it's helped you!!! Since then have you got any more out of it? The double cluster is amazing!!
  8. Nice, that helps quite a bit, have you tried using a telrad as well?
  9. LAME LAME LAME LAME LAME........and again...LAME!! I've been out a dozen or so times now out the town to get a decent view of the horizon, not a scratch as I've had the 'luck' of the only clouds inthe sky occupying that patch! Then for the past 2 weeks it's been a total grey out, I even jumped for joy at the sight of the moon last night, it's been THAT bad round here. I'm sure AN and S@N will regail us with tales of success replete with readers images, so much for the 'year of the comets'. I know it's not their fault, but just some realism added into their mags would go a long way imo. It's been utter failure for me so far and I'm on the verge of giving up, I'll find it no doubt in a few weeks as a tiny spec through the dob. As for ISON....meh, my hopes are so low if it even turns up it'll be the second coming.
  10. I can see where you’re coming from that some people do jump into quickly, and as a result some get disillusioned quickly if they’re not used to finding their way around. Dare I say though that tools like Stellarium are there to enhance and educate, as opposed to wholesale replacing ‘sky knowledge’. There are many users who do take the plunge though and buy a scope and in a relatively quick time can find their way around. I found planetarium programs much more useful in directly locating objects than sky maps say in Sky @ Night etc. A few years ago there weren’t these types of beginner friendly options available and people were forced to learn their way via star maps etc. It's just another means to an end. Where I feel programs like Stellarium and Cartes Du Ciel etc come into their own is when you’re looking at objects too faint to be on beginner sky charts. For instance you’ll struggle to find some planetary nebulas and the likes just off a star chart, you sometimes need that ability to zoom right into an object and discern the object from the surrounding starfield. Often beginner star maps don’t go into enough detail if required. I have some really detailed star maps (ie down to 14th Mag) and I still tend to take the laptop out if I’m looking for something out the way. Also planetarium programs give you the ability to simulate views depending on your equipment, you’ll struggle to do that quickly with a star map. Bare in mind you don't have to have a telescope to get usage of Stellarium, I was using it long before I bought a scope, infact it's one of the things that pushed me into buying one! Maybe it would be interesting to start up a discussion on the best beginner methods to find your way around. I think the aim of threads like this (ie specifically discussing Stellarium) is probably the wrong place to start that type of debate though!! All the best
  11. Check your EP specs and telescope....what size is the field of view stated? Finger in the air tells me you have a massive amount of magnification going on and you're looking between the stars! At the worst add in my telescope specs and EP's detailed in the original post, if it's still blank then we'll have to throw it out to the masses (I'm only a user of Stellarium, not a developer)!
  12. HI.... I wrote a post detailing how to do this (amongst other things) via Stellarium a while ago. Hope this helps http://stargazerslou...40#entry1859207
  13. I've just thought of something I may of missed regarding light pollution, relative scales of stars etc.... Once you've set them correctly (or as close as poss!) and back on the main view....click the configuration panel on the left hand side tool bar (or press F2) and click on 'save current configuration'. It'll also save the orientation of the view you have on the main screen at that time (and remember if you're in night mode or not). I have it set so when I load up Stellarium it's always zoomed out pointing to the south and in night mode. This is a useful link for all the keyboard shortcuts: http://www.stellariu...eyboard_actions I find it's often fun to set another planet as your home location (select the planet and press CTRL+G), it's errie seeing Earth as a crescent in the Martian sky!!
  14. My pleasure, there's many differing methods on how to starhop, I just found this the easiest way to get used to it. By all means if anyone finds any additional tweaks or hints please feel free to add on. I find the Ocular plugin so useful, I often enter in details for telescopes I don't have yet (ie a 16" dob) and all the EP's on my wishlist, it gives you a rough idea what you'd get before you buy so to speak! Stellarium is a great tool and there's so much of it untapped. Maybe it would be a good idea if we could set up a dedicated subforum with tutorials and collate all the information into one place.
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