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    Galway - Ireland

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  1. Imagine if you created a whole new type of clock, how would it work? Find Flamsteed's brilliant (but doomed) attempt to make a perfect astronomers' clock. One of only two angle clocks ever made. This clock was designed by John Flamsteed, first Astronomer Royal, to show the time in degrees, minutes and seconds of arc. In astronomy it is often more convenient to express time in this way. The earth turns through 360°on its axis every 24 sidereal hours. 24 hours = 360° 1 hour = 15° 4 minutes of time = 1° 4 seconds of time = 1' of arc 1 second of time = 15" of arc. The clock reads as follows: small window right of centre – tens of degrees; 'minute' hand – degrees, with 10-minute of arc subdivisions; 'second' hand – minutes of arc with 10-second of arc subdivisions. To convert the clock to read normal hours a special pendulum of 39.1 inches can be fitted and the small dial behind the aperture reversed to show I to XII hours. The clock then shows hours - and decimal parts of an hour. In practice this system was not very useful for astronomers and it is believed that only two 'angle clocks' were ever made: this one, and one by John Arnold, also in the Royal Observatory collection taken from http://www.rmg.co.uk/see-do/we-recommend/attractions/angle-clock-tompion hope that helps
  2. Just saw this, thought it was interesting read even tho with my limited knowledge i cant tell how much of it is plausible http://www.sciencealert.com/this-mind-bending-theory-merges-black-holes-gravitational-waves-and-axions-to-solve-a-major-physics-problem
  3. Uhwaz

    Hello from NZ

    Welcome to SGL Glad you took the advice and joined there is a lot of knowledge floating around this forum
  4. Welcome to the SGL from Galway
  5. Uhwaz

    The Beginning

    Pictures from the first year
  6. I have exactly same setup as you i use SW ST80 as guide scope with web cam and i used to use canon 30d recently upgraded to 450d Even tho i havent got chance to take any new pictures in about 2 years since my son was born and we bought house ( those things keeping me busy for some reason ) In work so cant post any pictures but if you look around there should be few from me here on forums so you know what you can expect you will be pushing EQ5 to the limit and praying for no wind but it can be done easy enough
  7. I have Baader zoom for couple years and i love it Pretty much dont use any other EPs
  8. Best done in day time focus on something far away like electric pole or church roof or something like that Just make sure you dont point it at the Sun !! Hope that helps
  9. http://www.12dstring.me.uk/fov.htm great FOV calculator
  10. http://www.12dstring.me.uk/fov.htm great site for looking exactly what you asking about
  11. 1) also check that your mirrors are not fogged up 2) try step down aperture with front mask hope that helps
  12. I'd Like to move my marker if thats possible as i bought new house in different location ( current marker is Marian ( another guy with light bucket ) in Galway Ireland
  13. i think its pretty much the same as http://www.firstlightoptics.com/maksutov/skywatcher-skymax-150-pro.html
  14. I had same issue with EQ5 and SW-200 you could look into something like this ( worked for me , focusing is so much easier with it ) http://www.teleskop-express.de/shop/product_info.php/info/p6385_Skywatcher-AccuFocus-for-Dual-Speed-Crayford-Focuser.html just make sure it fits your focuser
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