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Everything posted by Shibby

  1. While I don't pretend to fully understand the subject, I can at least point you in the right direction - this is known as the universal event horizon. The distance at which objects are so far away that the light from them has never had enough time to reach us (as the universe is 14bn years old). As space itself expands, galaxies reach these great distances without necessarily having to travel through space. The size of the true universe is unknown, it could be many many times larger than the observable universe, but apparently, I've just learnt, it could also be smaller!
  2. What nobody's posted the PlanetQuest URL yet? Also, the closest discovered planet to being "earth-like" is Gliese 581 d. It's small enough to be rocky and supposedly is in the habitable zone of it's star system. Edit: Correction, not necessarily rocky but liquid water is possible.
  3. ...Oh, unless you autoguide of course, this would of course utilise dec
  4. Although PA has nothing to do with tracking, it does mean that the tracking should be pretty accurate with just the RA drive right? (apart from atmospheric refraction - hadn't considered that!) EQMOD 'compensates' for any errors in the PA + other factors when doing a multi-point align. Are you saying that when you synch on one star, it still does this and therefore your Dec drive is active??
  5. Just to clarify, by memory Llamafarmer means disk space / storage. You will only need a portable hard drive if your disk space is running out.
  6. The type of software you're describing is known as "portable software" or "portable applications". I think it's possible to fiddle any piece of software into one by something called "application virtualisation", don't ask me how though! Are you sure you need to do this though? It's a common misconception that using up space on your hard disk affects performance. Only having many apps running in main memory does this. (the exception is totally filling your hard disk, meaning there is no room left for paging). Although it may sound like I know what I'm talking about when it comes to computers, this is the second time I've typed all of this out, as I managed to hit "post" when the connection was down, doh!
  7. For imaging, I'd like only the RA axis to be driven... Am I right in thinking that, after doing a polar alignment, a 1-star align will result in only the RA axis being active for tracking? (I want to keep Dec connected for positioning etc using Stellarium). I'm using EQMOD, by the way. The configured 'home position' doesn't affect things does it? It seems to me that synching on one point only would mean everything is relative to that and it won't be trying to compensate on Dec while tracking, only RA. Or am I wrong here? Ok, the question isn't that quick after all, but hopefully the answer will be Thanks, Lewis
  8. Very good star shapes for 2 minutes unguided... what alignment method do you use?
  9. I saw what I believe was one last Friday/Saturday am in the NW. It actually made me squint it was that bright!
  10. Yes but on the time scale of humanity, or even land dwelling life, it's pretty rare... According to wikipedia, Gliese 710 is predicted to come within 0.68 light years of us. Who knows the last time a star passed that close?
  11. Shibby

    NGC 4945

    Very nice image, NGC 4945 is full of strange and interesting detail. Are you the first SGL member to image it??
  12. What a nice looking galaxy! And well captured.
  13. I don't mind at all Doc! You've managed to get a nice black background. On my version, I've really overstretched the image to try and see the spiral arms. jnp, I've messed around with the black point (cropping the different channels), again so the spiral arm can be (*just*) visible. As you can see from the individual sub, there was pretty bad light pollution and I'm not sure how else to get rid of it? This is probably the cause of the messed up colour. And yeh, I have the annoying back-focus problem with the D70.
  14. Big thanks to everyone, your advice has been invaluable - I'm now the proud owner of a Vixen GP with EQMOD, in fact the one you posted a link for, zhgutas. It took me quite a while to figure out how to get everything connected, what all the various knobs were for etc etc, but I eventually had my first go with it Friday night (see an image here) and I'm very happy with the mount. I spent some time drift aligning, which allowed me to take subs up to about 1m30s - I believe I can improve on this with more time spent on the drift align. I could also do with an illuminated reticle eyepiece. I was relying on the camera's crosshairs this time. Speaking of PE, has anyone tried the EQMOD PEC? It can use a webcam to record the PE and supposedly compensates for it, cunning stuff.
  15. Hi folks, Here is my first imaging attempt with my new EQ mount. Many thanks to SGL users for their advice on choosing the mount! The skies were very hazy when I took these subs on Friday night - I literally couldn't see any stars to the NE where the light pollution comes from! I've upped my exposure time to 1 minute, this could be better with more time spent drift aligning and less haze... So this is 30x60s unguided ISO1600(by accident ), SW130P, unmodified Nikon D70 & 2x Barlow. Not great I know, but much better than I could get with my old Alt-Az. I think you can see one of the M81 spiral arms starting to show. More subs required... here's one of the subs:
  16. You've got a great result there unguided, I'm hoping to achieve something this good now I've got myself a new mount... Did you drift align?
  17. Surely darks will get rid of this wont they? And you'll use far less data with a master dark stacked in DSS rather than a separate one for each sub (as the camera based NR will do). Fantastic image by the way, I love the definition on those blue whisps.
  18. May I recommend the book "Turn Left at Orion", it's a great book to tell you what to look for when, it also gives you a good idea of what you can expect to see and how well you will be able to see it with a "small" telescope, by the use of nice little sketches.
  19. The Moon does indeed look stunning, I own the same telescope. Through the 25mm supplied eyepiece, it will fill roughly half your apparent field of view. With the 10mm, it will totally fill it. The moon looks best at half phase, the light and shadow at the terminator emphasising the lunar terrain.
  20. Nice work Francki, its a great collection to have under your belt! How did you take the Earth image? ;-)
  21. I personally didn't have much success with this method, having used it when I first tried my hand at imaging. See my pitiful attempt at M31 here: http://stargazerslounge.com/imaging-deep-sky/59793-lets-see-your-1st-dsos-5.html#post1322985 ...but then I didn't really know what I was doing. I have a Nikon D70 and have only had any real success with a barlow only. You might be able to achieve prime focus (I can't) with your scope though, which would be much better. Note that at prime focus you will probably get a narrower FOV (higher mag) than with, say a 25mm eyepiece. Using an eyepiece for extra magnification is not really viable, you are better off with barlows.
  22. Nice nebula indeed. Not for a while by the looks of it, but JohnH managed a great image!: http://stargazerslounge.com/imaging-deep-sky/72325-pk164-headphone-nebula.html
  23. I found this article rather interesting: Turning noise into vision | R&D Mag I wonder if this technique could have an application in astronomical imaging? The article is a bit vague on how it works exactly, but it seems to suggest that all the techniques used are at the objective end, i.e. at the camera.
  24. Awesome second image there, feels like an alien world! (apart from the portsmouth bit
  25. I know it's shrunk a lot in the last 15 years odd, apparently by 15%, but I can't find anything in the news about any potential supernova indications... Last I heard the prediction was "any time in the next 400 years"
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