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EA2007

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Everything posted by EA2007

  1. Very good for 2 minutes. A good alignment with my (N)EQ6-Pro can just about push 2 minutes without trailing. More subs will add finer detail, keep it up laddo.
  2. distances are immense. here's a little bit of trivia The distance between the Earth and the Sun is approx 91 million miles, the distance from the Sun to the nearest star Alpha Proxima (Centaurai) (outside our Solar System) is 4.2 light years (or 24.686 trillion miles). On a scale of 91 million miles at 1cm (i.e. the Sun to Earth distance being 1cm) then the nearest star Alpha Proxima is 2.7 kilometres away
  3. Hi Paul, Your probably gonna get a few answers to this all saying pretty much the same thing. Lets start from the top..... Is the Orion nebula free-floating? Well yes, everything in space is free-floating, although most of it is bound by gravity to larger scale structures (i.e. the Earth to the Sun and likewise the Moon to the Earth), but the distances involved are so large that they are independent from one another. Is the Orion nebula inside a galaxy? Yes, it is, it partly answers your next question because the Orion nebula is in our home galaxy the 'Milky Way'. Any object you see in astronomy pictures or though a telescope (with the exception of galaxies) are found in our home galaxy the 'Milky Way'. The Orion nebula is about 1,500 light years away, whereas the Milky Way galaxy itself is about 160,000 light years in diameter. Is our Solar System inside a nebula? No, although it would once have been, around 4.5 to 5 billion years ago. About this time then the solar system was being formed, a previous star from the era after the big bang (13.7+ Billion years ago) would have exploded creating a supernova, the material held in this supernova would of condensed forming a more structured nebula (a bit like how we see the Orion nebula) and from it matter would get clumped together under the force of gravity. Due to the conservation of angular momentum (snazzy!) material bound by gravity would begin to spin, this attracts more material and the influx of new particles would eventually build up a massive spherical structure, this would eventually become what we know as the Sun, immense pressure would ignite the hydrogen gas under nuclear fusion and a star is born. Similar spherical structures would be occurring near this star, although not on such a massive scale, it is these objects we call planets, due to their lower mass then they begin to orbit the Sun. All material in the Solar System and here on Earth (including the plastic on your keyboard) originated from a star. The nebulous material would have been 'hoovered' up by the Sun or blown away towards the interstellar medium by the Sun's outwards winds and it is because of this that we don't see any today. So when we look up at the night sky, we don't see ionized hydrogen or pinky/blue/purple gas we see black skies as the nebulosity has depleted as it has condensed into larger scale solid structures.
  4. Thanks JohnBoy, no I wasn't using a reducer, I was going to get one, put my f/12 Schmidt-Cass down to f/6.3 but I then got the autoguider so didn't persue it anymore. TomHow, yeah its a standard 450D body I am using, and your right a few more subs will be worth it. I need to work on the flat frames, but all good practice, they're not brilliant images, but I am happy with them from the methods used.
  5. Evening people of the astronomical variety. Here are some photomographs for you to ponder over.....I particularly like the green haze to the Dumbell, it looks quite snazzy, or as my dad would say "is that a smudge on the screen? Is it meant to be like that?" Taken the other night (Monday I think) in pretty dark blue skies around midnight in North Yorkshire with a Canon EOS450D t-mounted to a Celestron C8 Schmidt-Cassegrain combined with some patience. Roughly 12 x 45 sec shots at 800ISO stacked in DSS with a few darks and tweaked a bit afterwards. I would of autoguided with the ST80 and Orion StarShoot but the software had a paddy on my lappy and wouldn't work (damn it!) Anyway, enough waffle, here's the pics.....not brilliant but there's potentially some potential.
  6. lol yeh thought so re the spikes re the universe size, I'm staying well away! Cheers.
  7. Hello, Forgive this rather daft question (as some may find it), but my dad just asked why diffraction spikes only occur on images of stars and not other DSO's such as galaxies, nebulae and such-like. TBH I couldn't answer him. I was showing him an image of the Hubble Ultra Deep Field and showed him how the Hubble telescope is a Newtonian design because of the spider struts that produce the 4 lines around the foreground stars. Even the smaller spherical galaxies in the image didn't have any spikes, yet the larger foreground stars did. Any answers? On a side-note: We were looking at the image in the 'Wonders of the Universe' book by Coxy and Cohen and I noticed that on the inside dust cover then the opening paragraph states "you find something of unimaginable age and size: 13.7 billion years old, 93 billion light years across and filled with over 100 billion galaxies etc etc", however on page 8 then the opening paragraph states: "At 13.7 billion years old, 45 billion light years across and filled with 100 billion galaxies etc etc" Surely the 93 billion LY's and 45 billion LY's are contradictory? I also find the statement somewhat irregular as I have always found the size of the universe (not that its measurable btw!) but I have always found it to be stated as the observable universe to be 13.7 LY across. However there is no centre point, even if there was a centre point some 13.7 billion LY's away then the other side would be 13.7 G LY's away from that, so in essence its 27.4 G LY's in size (G being Billion's of years).........but all of this is incorrect.
  8. From several guided images of a moonwashed Orion nebula (sorry for another 'M42' pic people), but I managed to get what I think is either a satellite trail or a meteor trail in a single sub, open to discussion. The full image is second, from 7 x 1 minute (average) subs @ ISO 800, no darks, no flats, no bungalows Stacked in DSS and played around in Canon DPP. Its my first proper autoguided image using the Orion StarShoot Autoguider, I would have gone for longer subs but I was just testing it out. Formed using the Orion ST-80 refractor and my Celestron C8 Schmidt Cassegrain. The C8 was the guide scope as its quite slow and the ST-80 was the imaging scope as I wanted a nice widefield shot with a Canon EOS 450D attached. Enjoy
  9. UPDATE: I bought the Orion starshoot autoguider package last week and successfully managed to attach it to the C8 scope (see picture below) via two butterfly clips, some rubber tree-ties and some pieces of vehicle fan belt. Tried the whole set-up last night in reasonably clear conditions and had semi-sucessful results. The good stuff: Mount is balanced well with the guidescope on the top, no sign of slippage and everything connects to everything else okay. The optics in the ST80 are amazing, far better than what I was expecting. Its fast F4 ish focal ratio gives quick imaging and the autoguider is a breeze to set-up. It seems that everything talks to each other....good times! The not-so good stuff: After spending 4 hours in the cold (2 hours of which were spent aligning all the scopes and balancing it out properly (.....stupidly not with all the equipment attached which I think is causing the star trailing error as you will read in a minute) and attaching all the cables, I had some star trails. It appears that PHD didn't track after a given star for more than 3 minutes -ish. I assume this is down to the star not being focused enough, or having low S/N ratio, or the scopes weren't balanced properly or the powertank I was using was running out of juice. I'd go for the latter, mainly as I have had trouble in the past with it conking out after a while. Symptoms......well the green cross hairs that show above a selected star (in the PHD Autoguide program) stayed still in PHD and the green square box moved with the star for a little while and then turned to a yellow dashed line and the window surround flashed red for a while.....I assume this meant the guide star had been lost. Do the green-cross hairs move with the guide star or are they meant to stay in the same place? Any advice on this would be useful.
  10. Evening, The package was delivered today at work good times. Unpacked it all and everything looks great, the body and housing of the scope looks sturdy, not like I was lead to believe by some reviews. Attached the tube rings and dovetail to the ST80 and its all housed quite nicely. Had a quick play with it on my NEQ6-Pro and its pretty damn good for observations, a nice wide field of view and good colours. Few issues, from how I imagine the rings connect to the dovetail the bolts that hold it together are not fluch with the bar i.e. when you go to insert it onto the mounts dovetail mounting then the main balance point means sitting the scope on the boltheads, other than that its okay. Haven't had time to try the autoguider out yet, its quite windy outside, but also........more importantly I haven't figured out hwo to connect the ST80 to my Celestron C8 yet. Any ideas?
  11. Purchased it last night and its being delivered shortly from what I gather. Shall give an overview when I have unwrapped it all. However, I do not have any scope rings for my C8 telescope so fixing it on might need looking into.
  12. Evening Olly, I have the 'N' version of the EQ6-Pro, not quite sure what the 'N' stands for...I pertain its for 'Newer' as I haven't seen it printed on the older models So, no my mount is an Equatorial one, not fork driven. I think I'm going to buy the scope and autoguider tonight....it seems good from reviews I have read.
  13. Hmm, cheers but I've found it for a price which I believe would be cheaper than getting a ST80, QHY5, scope rings, adapters and software. Read some good reviews about it online, was just after some thoughts from anyone who already has it.
  14. Evening. Been after an autoguiding setup for a while and now I have some cash-eesh in the bank I am thinking of purchasing a guidescope and cam for my rather slow but infinitly cool Celestron C8 Schmidt-Cassegrain. Had a quick 'Google' and found this little dude: the 'Orion Awesome Autoguider Package' for around £350. It consists of the Orion Starshoot autoguider (incl. connections), a 80mm Refractor and software along with scope rings etc. Just wondering if anyone had any knowledge of this product first hand and if it was worth purchasing. OR........if it turns out its a load of tosh are there any other relitivly cheap ways of autoguiding. Thanks in advance.
  15. Did you get my e-mail?? Sky is amazing tonight.....I stayed in to watch Zoolander, whoops.
  16. EA2007

    Bodes

    wow, they are nice. good job.
  17. No worries. Darlo? Northallerton is okay, Darlo's a bit of a dive these days though! Flattery? Nah, just trying to bribe you, I can do the observational side of things and you can do the sciency bit! (btw there should be plenty of local ales and food there...bonus!) From what I know so far (its still all preliminary stuff) then they are looking for someone to lead a few sessions in the planetarium, then maybe have a group of 'experts' giving a workshop or suchlike to family groups / kids in the daytime. Then in the evening they would like a few astronomy boffs to give some night-sky sessions to adults / children. I have told them that it gets dark enough after 10pm to view the planets (think Saturn is visible during July) and good enough for the MW at 11pm............if its clear that is! Duno how good or bad the LP is going to be, York is the nearest city at 20 miles away. And yeah, sure bring Ali along, haven't met him yet. the more the better...especially if he's good at astro stuff and presentations. Cheers dude.
  18. Paul ! Nice to hear from you. Your quick to reply aren't ya...tho u never reply to any of my text you cheeky sod! Anyway, you were my number one hope on this one given your vast knowledge of universal things erm I can fire you some e-mails if you like that explain it in a bit more detail ?
  19. Evening all, I have been contacted by the admins for the Deershed Music / Arts Festival to be held in late July 2011 in a bid to host an astronomy themed weekend. Its all in the early stages but the organisers were looking for anyone (primarily local) who could come along and help out. I have offered to go along and give a few 'astronomy sessions' and possibly lead a few sessions in York University's Cosmodome which has been lent to them by the kind people at York Uni. Basically they / we are after a few more down to earth (excuse the pun) people to help those not so aufait with the night sky get an good introduction to the wonders of the universe above them. The weekend is aimed at families, although there is likely to be a host of generations and 'styles' at the venue. If anyone near North Yorkshire is interested in helping out then please drop me a PM or reply on here and I can give you more information. You may even get a cash incentive for travel fees and it appears that the whole weekend will be catered for so a fun relaxed time will most likely be in order. There should be insurance availbale for anyone wishing to bring imaging equipment, telescopes, and other astronomical accessories and security will be provided to make sure everythings looked after.
  20. 12 or 14 was my count, not very precise but averted vision plays tricks sometimes.
  21. Canon EOS 450D 5 x 2 minute subs ISO 800 RAW with defaults no darks no flats no bias no idea stacked in DSS, adjusted in DPP and Irfan View
  22. grand. Aye, if its during the day there ain't no better place than a groovy city like Edinburgh. Think I owe you a drink anyway Paul after Costa coffee in town that time. There was (probably still is) and Astro-Cafe in Cathays, Cardiff that did good chilled out lectures....they also had beer on tap! So anywhere like that would be good.
  23. me and (Narrowband) Paul will do a session...mainly Paul doing the talking, I'll sit on the sidelines providing vocal support with such classic lines as "Is Jupiter bigger than the Sun?" and "Just when will NASA be visiting Uranus" Just kidding on that last part, but I am more than willing to help out. Location wise, well....hmm, plenty of votes for places all across what is known as the 'North'. I'd say somewhere around Keilder would be okay or in the NY Dales or out from Edinburgh. Decisions decisions! I do however know of a B&B / Campsite in the NY Moors that is meant to be quite good...decent transport links etc. Maybe we need a poll.
  24. red light districts......hmm, maybe not family friendly
  25. As a rule at 27fps then you need around 750 frames for 30 seconds. So as Takahashi says, 1500 will get you 60 seconds worth.
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