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About DarkAntimatter

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  • Interests
    observing and imaging
  • Location
    Pennsylvania, US
  1. What ap did you use for an 8 sec exposure? I have an s8 also and the stock camera won't do timed exposures.
  2. 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.
  3. I wonder how they would compare with a TV panoptic. 70 vs 68 degree fov; 20 vs 24mm eye relief.
  4. I think we're too worried if we even have that MOJO anymore.
  5. 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?
  6. 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.
  7. 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.
  8. 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.
  9. So better to learn these directly and why they are needed I suppose.
  10. 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.
  11. 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.
  12. Out of curiosity, which maths do you recommend in order to have a good understanding of QM?
  13. 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.
  14. Does anyone know of any examples of other warped spiral galaxies that are visible in amateur scopes?
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