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DarkAntimatter

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Everything posted by DarkAntimatter

  1. A lot of useful information there, thanks for posting this. I'd like to get a wider field eyepiece for my C9.25. Here in the US the XW40 is about 15% cheaper than a Panoptic 41.
  2. I wonder how they would compare with a TV panoptic. 70 vs 68 degree fov; 20 vs 24mm eye relief.
  3. I think we're too worried if we even have that MOJO anymore.
  4. Well, if it turns out it's worthless I'd be willing to take it off your hands for you. Hope you find it soon. Possibly in a jacket pocket?
  5. Here is a serious but probably also ridiculous question for Tak finder owners: can they also be used as guide scopes? I guess I'm asking if one can attach a camera. For the record: (1) I actually look at the night sky with by FC 100DF, (2) I like the new Tak blue too.
  6. For what it's worth, some programs do make use of GPUs to do computations, not just for displaying graphics. Many scientific programs do this. This almost always means running Cuda on Nvidia cards. The pixinsight web site mentions that the present version does not use Cuda, but it is planned for the future.
  7. A mathematician would say the complex numbers are just ordered pairs, with a slightly different definition of multiplication. So I don't see any problem thinking of them as two component vectors. But with a natural pairing between the "real" and "imaginary" parts. I find it fascinating that there are reals, then complex, quaternions, and octonians, but those are all the division algebras over the field of reals; there are none made of 3 or 7 or 10 or whatever.
  8. So better to learn these directly and why they are needed I suppose.
  9. Thanks, that is a good list. My background is as an engineer so I have a (very) little bit of familiarity with the above. But I found it slow going when things turned to Pauli (which seem to be important to really understand spin), and especially gamma (Dirac) matrices. I was not sure if this is something that I should just be expected to learn from the information in the QM book or if there is a particular math subject that would cover this better.
  10. Thank you. By "good understanding" I meant what particular math so that QM becomes not very complicated. I expect that will mean more than algebra, ode, and some Fourier analysis.
  11. Out of curiosity, which maths do you recommend in order to have a good understanding of QM?
  12. Well, to partially answer my own question, I did a little googling and did not uncover any in range of amateur scopes but this APOD from 2012 is a Hubble image of a galaxy 150 M ly away.: https://apod.nasa.gov/apod/ap120304.html It looks similar to the above diagram of our galaxy to me.
  13. Does anyone know of any examples of other warped spiral galaxies that are visible in amateur scopes?
  14. Another possibility is Autostakkert. As!3 works well for me in wine on Ubuntu and I've been happy with it.
  15. Yes, they start nearer the poles and gradually get closer to the equator as the cycle progresses. The northern and southern hemisphere spots tend to have opposite polarity and this reverses with each new cycle as mentioned. One can find a summary of the day's activity on several sites. I like the one at http://www.solen.info/solar/. This is indeed a cycle 25 spot, but not the first.
  16. Were the white strips only on the png? I've seen something like that in gimp before when I exported to png and I was able to eliminate it by setting the compression level much lower than the default value of 9.
  17. Nice, you've captured some detail. Focus does look a little off but not bad. The mask will probably help. Stars look fairly round to my inexperienced eye but some more experienced users may have more to say. Good job - looking forward to the next one.
  18. Wow, looks great and especially impressive that that is just one frame.
  19. Looks nice. There is some surface detail in there in addition to the pole. All I see through my scope is a coppery, sun-like ball.
  20. I agree about photoshop. Gimp is really powerful, but probably not quite as full-featured as ps and less user friendly. The main drawbacks of non-WIndows, to me, are no photoshop, fewer games, and no office for the case when you need to collaborate with office users (there are good alternatives if office compatibility is not important). Well, OSX has ps and office, so I guess that is a linux drawback. I do use high-end NVIDIA graphics cards for both visual and CUDA applications and don't have trouble with them at all. NVIDIA provides and frequently updates their drivers in linux as well as windows. The HPC (high-performance computing) world is dominated now by computers with CUDA GPUs and almost all of them run linux - GPU support is solid, at least for NVIDIA GPUs. I've found network printers are supported very well and linux finds them without any hints and gets the proper drivers for any printers I select. Haven't tried connecting a printer directly to the computer. My Nikon DSLR works well; haven't tried Canon. I guess operating systems are something of a personal preference issue and they all have their pros and cons.
  21. Well, there are a lot of things that just work in linux too. Speaking as a person who uses computers to get stuff done but doesn't enjoy trying to iron out issues I find linux more productive overall for me. Try installing a recent linux desktop, such as Ubuntu, and a fresh copy of Windows 10 on a new computer from scratch and you might have a different outlook on which comes the closest to just working. In the old days linux had a lot more problems but I suspect it now works out of the box much better than WIndows. The reason Windows has an "easy" reputation now is that the new computer almost always comes with Windows already installed for you. Granted there will be the occasional new device which needs a special driver and for which the manufacturer hands you a Windows driver but doesn't have one for linux, but it is getting rarer. I would also cast a vote in favor of a getting started with Kstars/ekos thread, thanks.
  22. Just ordered one on Friday with similar reasoning: planetary and can be guide camera if I ever take the plunge to a more expensive, cooled camera. Would be happy to hear your thoughts when it arrives. Mine is back ordered right now. ?
  23. OK, just wondering because that's a fantastic nebula image with no narrowband filters.
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