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About Astropy

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  1. 1, 2, 3, 4, 5, 4 ? Great lectures though, fascinating little universe we have here
  2. But as the visible light gets redshifted into infrared, ultraviolet light gets redshifted into visible light, which is why redshift does not resolve Olber's paradox. Then again, if the universe was infinitely old, and consisted of a finite-but-boundaryless 3D space (meaning if you keep going in one direction you would eventually come back to where you started from) we would be able to see every celestial object twice in the sky, once on each side of the world. For example the Andromeda Galaxy, we would see the photons that come directly at us on one side of the earth, and on the other side the ones that travelled away from us but have completed a complete "lap" around the universe (maybe looking very different than the Andromeda on the other side, since these photons have been travelling for a much longer time). As far as we can tell, this doesnt happen, therefore the universe is not infinitely old and the photons going around the other way haven't reached us yet.
  3. Sorry, little typo there, the AVX is 800 without scope, not 700.. But yes, that is the one, and it IS only $100 more than the mount alone!
  4. After reading quite a bit around this site I have learned how unbelievably crucial a good mount is for good AP. Then I found a great deal on Opticsplanet, where I found that the AVX Mount alone costs $700, but with a 6" f5 Newtonian on top, it costs only $100 more.. Now my question is, being only such a small difference, is the scope complete garbage? Or could it be usable, at least to get a feel for AP through a telescope, and maybe in a few months/years upgrade only OTA since I'll already have the AVX? Thanks for all the friendly help
  5. Nice little dots you got there, for 600mm that's impressive
  6. Those are beautiful! Hope I can get something like those in the future If I have a budget of around $300 for a new lens and I already own a Nikkor 50mm f1.8, what would you guys recommend as a worthy upgrade for AP?
  7. This got me thinking.. Would it be possible to use something like this with a simple webcam through a simple finder scope on a simple (ok, a motorized one) barn door tracker as a <$100 setup that may give a $1000 setup a run for its money?
  8. Still can't pick my jaw off the floor, this is just absolutely amazing
  9. Looks like a neat little addition, sadly I have a Nikon and that system is specifically for Canon After a quick google search I did find this: "Gerd Neumann at Astronomik informs me that they are working on a clip-filter system for Nikon bodies that should be ready for sale by late summer." posted on a different forum in October 2013
  10. Can't seem to be able to edit my last post so I'll make a new one.. One more question that I have, is there such a thing as Narrowband Filters for Camera lenses? Because the only ones I can find online are 1.25" or 2" for telescopes.. Would they not work with a camera and that's why they are not sold, or am I just not searching right?
  11. Wow, beautiful! Please excuse my ignorance, but what object is that? Also, did you use some kind of a filter to bring out those reds? H-alpha or something like that? I do have an old Nikkor 50mm f1.8 prime lens, gonna give it a go with that and see what I can get
  12. How far can one get with only a camera, maybe a DSLR with a reasonable size telephoto lens, and some form of tracking (maybe a eq mount or a barn door tracker)? If the tracking is good, could one equal the quality of pictures taken through a telescope, at least for DSOs? Is anyone on here into this kind of photography? If so, please post your photos, show us what kind of pictures are possible with a simple setup like this!
  13. According to what I have read, two of the more noticeable colors on moons surface are the orangey-red of iron deposits and the purple-bluish of titanium.. I wonder if those colors are more noticeable for someone standing on the surface of the moon than from earth
  14. Great picture and comparison, you're not too far off!
  15. Great info guys, thank you! Will definetly be looking into getting 2, maybe 3 good EP's with a barlow.
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