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    Hartlepool, North East England
  1. that disk size is almost what i get for saturn. What magnification is this at??
  2. Just submitted my assignment for S194 last week. Starting Planetary Atmospheres with LJMU this week.
  3. What no exoplanets. I think these for me as knowing for deffo there are hundreds and therefore probably thousands or even hundreds of thousands in the milky way alone. The potential for life out there is growing with each discovery.
  4. We have only been producing radio signals for a hundred years or so and tv signals for a lot less time. These signals travelling at the speed of light would of only reached stars within 100 light years of us. Assuming there was life in that range and the understood our signals and had the technology to send us a message it would take 100 years to get a reply. Most stars in our galaxy are a lot further away. So that is probably why ET hasnt rang us yet.
  5. Spirals can be seen to rotate in either direction , but the spiral arms trail behind the rotation, not lead. There are some that may be going the opposite way but it is believed something dramatic happened to them to change it.
  6. Spiral galaxies rotate around their central bulge. Elliptical galaxies dont rotate. Their stars have random motions. In Spirals the stars rotate around the core due to the same rotational forces that cause moons to go round planets and planets round stars. However the total mass of all visible parts of a spiral does not produce enough gravity to maintain this rotation. This is one piece of evidence for dark matter which makes up the majority of the mass of a galaxy and provides the gravity needed. Even though the stars in the spiral arms are rotating around the centre they do not remain in the spiral arms. Density waves rotate around the centre causing new star formation as they go so new stars appear in the arms and existing ones leave the arms. All be it over long time periods.
  7. As the thread title says guys , what do i need and from where so i can piggy back my DSLR onto the top of ETX 90
  8. It has a focal length of 350mm according to what i have found on net , an spc900nc is approx equivalent to 6mm eyepiece so would have a magnification of just under 60x with the spc900nc in. This would be ok for moon and sun(with baader filter) but planets would be small. I have the ETX 90 and it has a focal lenght of 1250mm (200x mag with SPC900nc) and this is the largest i can get of Saturn for e.g without Barlow lens. Then you have focusing issues if magnifcation is too high for aperture.
  9. Liverpool John Moores University do a whole selection of Astronomy distance courses
  10. Anyone done the Planetary Atmospheres course. Thinking of doing it July this year. Am most of the way through OU S194 and will have the EMA finished in the next week or 2. Did the Galaxies course at LJMU a few years ago with a pass of 79%. The plan is to do Exoplanets and Stars courses at LJMU but they overlap by a month so thinking of doing Planetary Atmospheres , then Exoplanets and then next year Gamma Ray Burst and Stars courses. Any info on any of the above LJMU courses would be appreciated.
  11. Patrick Moores Biography is a fascinating read. Have also just read a book called "Strange New Worlds - The Search for Alien Planets" , a factual book about the hunt for exoplanets and the methods and mistakes made along the way.
  12. The phenomena is called synchronous rotation and is caused by the tidal forces of being close to the planet.
  13. teacher probably thought M42 was a motorway
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