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Showing content with the highest reputation on 29/11/13 in all areas

  1. 2 points
    I've tried turning my back on the moon but the tidal bulge of my stomach seems to be unaffected. Disgusted of Etoile St Cyrice.
  2. 2 points
    Hi David I've found the Mellish technique works really well for adding detail to galaxies and nebula, when I started sketching with my old 200P galaxies were just a faint smudge so I could get away with using graphite pencils and just smudging it with my finger. Moving up to 12" aperture actually showed detail and I wanted to record that in the easiest way so those pencils were replaced by pastels which you can rub on a piece of sandpaper then use something to brush that dust on which gives you more control (in theory! ). I'd say the Mellish technique is a little more time consuming and can also be frustrating at times, pastel pencils can be a pain as they are quite soft and tend to break when sharpening, you also have more brushes etc which you can guarantee you'll drop and have to hunt around for in the dark!! Sketching onto black paper is good though, I really like going to the darkest sites possible and even a red light onto white paper seems too bright for me, the black paper doesn't reflect any light back at you so you can get away with using a brighter light. I use a Kindle reader light wrapped in red acetate which just clips onto the sketch pad. Funnily enough I don't really get cold hands, I find if I just keep my head and body warm really warm I'm ok. I've got fingerless gloves but rarely use them and find the only times they come in handy is when there is a really cold wind. The drawings don't take that long to do so maybe 20 minutes at most, sketching is really all about observing and I figure that as long as I'm looking through the EP more than looking at the sketch pad then I'm doing the right thing. In total each sketch/observation takes between 45 minutes to 1 1/2 hours it just depends how interesting the object I'm viewing is. I never rush, sketching is way to relaxing to rush it! The first pic below shows what I use now but probably half of that is for lunar sketching which you won't need for DSO's but these are the sort of things you'll need to get - Conte Pastel Conte pastel drawing pencils White ink pen Brushes ( I use 10mm/6mm/4mm ) Cotton wool buds Rubber Pencil sharpener ( Save yourself a lot of frustration and get a Dahle 155 like in the pic, everything else I've tried just doesn't work! ) Sandpaper I just google art supplies and go for the cheapest option after delivery. I'd try an open cluster first and just use a normal graphite pencil on white paper just in case you find sketching isn't for you. Hope that helps a little.
  3. 2 points
    The sketch in post #4 is a brighter version of what I see with my 10" at a dark site. It's a real toughie from my backyard, needs a transparent moonless night to see anything at all. You can always pan down to M42 to get your 'nebula fix' Regards, Ed.
  4. 1 point
    You would need to find something VERY precious indeed to make mining it from the Moon economic. The figures don't add up at the moment. The motives must be as a technology demonstration and for the PR value.
  5. 1 point
    Absolutely mate. I just gotta wait till these $%%^^ clouds melt away..
  6. 1 point
    Well the Sun gravity is 28G (28 times Earth gravity) at it's surface. Not sure how much reduced it is at the comets nearest approach, but it's probably not much less. You wouldn't really feel it though if you're on a fly-by orbit. The reason comets can break up is because they are so weakly bound together that it takes very little force to break it.
  7. 1 point
    You can use JPEG - although not the best format. you should have got something. Unfortunately I can't view the original zip file (work security blocks it). when I save a stacked image from DSS I save it both embeded and not embeded and then continue using GIMP.
  8. 1 point
    You'll be needing a 3" extension at least. I've used them with a refractor and an Orion Optics Newt without problems. Without a rotating focuser you're going to have to revolve them to view. Not only that , but you're going to need double eyepiece purchase to get up to a useable x100-x120. I 'd see if you can try them out anywhere, they don't suit a lot of folk. A good ep goes down well at Christmas and you'll use it every session, Nick.
  9. 1 point
    Have to agree, that was a really good movie.
  10. 1 point
    Don't, it will be next to the Sun, very dangerous to look at that time! It's a bit late now to try and see it before it reaches the Sun. If you wait, assuming it survives it will re-emerge maybe with a good tail and be visible on its return from the close encounter - I think 3rd Dec onwards would be good to view it, where it will go right across the sky towards Polaris and beyond. That's if it survives, there's a good chance it will not, but it might...
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