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About george7378

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    Proto Star

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  1. Thanks for the replies yeah, the sky from the Indian Ocean is something I can remember really well from holidays when I was young. It was the first thing I wanted to see again when I went back last year! thanks for the encouragement! One thing I can do here is watch for the ISS and broghter satellites, I'll try and capture a few passes as I still have my camera.
  2. Hi everyone, It's been years since I posted anything on this forum! It's also been years since I've had a proper observing session as I've had uni, work and other things to think about. Also now that I live in London it's unlikely I can do any proper observing! Anyway I've been missing it lately, and thought I'd pay a visit to this forum again, starting with a simple little Milky Way image I took on holiday last year: Here's hoping that in a year or two I'll be able to think about setting myself up with a telescope in a nice dark place again
  3. Hi everyone, I have the position of a satellite in topocentric cartesian coordinates (i.e. the position of the satellite is given in [x,y,z] coordinates with the Earth-bound observer at the origin) and I want to convert this to and RA and Dec position as seen by the observer. I have seen formulae on this site: http://www.castor2.ca/04_Propagation...uat/index.html ...and the one for declination works fine, but the RA formula sometimes gives me a number larger than 360 (I'm working in degrees rather than hours) and even when I subtract 360 it isn't correct. This seems to happen about half the time, and I can't find any alternative formulae! Can anyone help? Thanks!
  4. Thanks a lot Actually Gary, this was my first try at a shot like this, and I guess I just got lucky! It was just a point and shoot job! summerstars - how did it go?
  5. Since the ISS was going to be crossing the Moon in full illumination, I wanted to try and get a widefield shot. I think it worked! The station was visible the whole time as it flew across the crescent moon at full brightness. Taken with a Canon 1100D, 30 seconds @ ISO 400 and f/9.0
  6. I saw Panstarrs for the first time tonight! It was amazing next to M31, and I got some decent photos of it. The binocular view was great too, especially with the trees to frame the comet!
  7. It's not a Comet Panstarrs post, sorry! I took these tonight - some widefields of the western horizon, and a special visitor - an unexpectedly bright flare from Metop-A as it flies over to the north:
  8. The likelihood is that if two neutron stars collide, the degeneracy pressure supporting them will not be strong enough to overcome their gravitational collapse and they will explode as a type 1a supernova.
  9. Absolutely perfect - is that faint halo of nebulosity surrounding the main galaxy actually part of M31?
  10. There's some lovely shadowing in there - reminds me of the view through large binoculars or my telescope with the 25mm eyepiece. I prefer the stacked image BTW!
  11. Beautiful! The layer on the bottom photo really lets me visualise the Sun in 3D. That's a lot of sunspot numbers
  12. The amateur Jupiter images are getting better all the time, congrats I love seeing how they evolve over the years I've spent on this forum!
  13. I've been wondering the same thing for years - every time I come round to thinking about buying I always manage to talk myself out of it (it just seems too expensive). I should probably look through one first though before I make judgement!
  14. Thanks I think this is my favourite type of astrophotography - seeing shots of the Milky Way over the Earth's terrain is always awesome!
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