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beka

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About beka

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    Star Forming

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  • Gender
    Male
  • Interests
    Besides astronomy, all science, computers
  • Location
    Ethiopia

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  1. Hi Mike, you have to fit the steeltrack focuser in place of the standard visual back adapter. You will then need a 2 inch to SCT adapter to fit the 6.3 flattener/reducer. Best!
  2. The maths in the article we had to review was not covered anywhere in the course but in retrospect I think it is a rather specialized area that is probably not covered in general undergraduate courses. It was to do with Velocity Ellipsoids and digging into that takes you into deeper mathematics like Tensors also not covered in the course. But it is stated that for Level 5 modules some independent work will be needed - I personally don't think this should put you off. For the "Energy Matter and the Universe" course the maths and physics required is covered in the course materials. My favor
  3. Well, regarding how much physics and math you end up getting from the 'Energy, Matter and the Universe' course, while I am unfamiliar with the A level I have seen some of the International Baccalaureate (IB) courses my daughter had been doing which I understand are of a similar level. So the physics will be at the same kind of level as the IB Higher Level (there is also standard level), The mathematics though I believe might be on a slightly lower level than the IB Higher Level mathematics. In the 'Milky Way' course we had to review some papers and the mathematics in some of them was beyond th
  4. Hi Newbiestargazer, If you are completely new to astronomy I am not sure it is a good idea to dive strait into astro-photography. It might be better to do some visual astronomy even with a pair of medium binoculars to familiarize yourself with the night sky and the objects that will be of interest to you. The gear you use for astrophotography is different for planets and so called deep sky objects for example, or if you want to do wide field vs galaxies or globular clusters. Also if you already have a DSLR and all you want to do is wide field stuff you may not even need a telescope - you
  5. I have completed 8 courses, currently on my ninth. Here is the list... Introduction to Astronomy, Introduction to Cosmology, IT for Astronomy, Energy Matter and the Universe, Investigations in Astronomy, Sun Earth and Climate, Introduction to Astrobiology, The Milky Way and finally Ultraviolet, Optical and Infrared Astronomy. The last which I am currently doing. Some of them require the first two as a prerequisite. I have really enjoyed all them - the course materials are fantastic. The instructors when needed are responsive on the forums. I intend to go as far as I can to the exten
  6. Hi Kadersin, While I have no experience with the NexStar 6SE, I have used the PowerSeeker 127 and I have no doubt that it would be a worthwhile upgrade. Just the stability and goto features of the mount will give a much improved observing experience. You will need to factor in getting better eyepieces though if all you have are those that came with the PowerSeeker. Cheers!
  7. That is strange isn't it? H-alpha is red so they should work best at that wavelength.
  8. I was thinking, does an apo produce better images than an achromatic refractor for narrow band imaging? Chromatic aberration should not be an issue for NB but I read somewhere that for apo's spherical aberration is corrected for two wavelengths vs one for achromats. Cheers!
  9. Hi Celestron4, I have not used it so far but I purchased this that Celestron says can be attached to any of their SCTs to "piggyback" your DSLR. Cheers
  10. Use your 4mm eyepiece on a brightish star, center it in the field of view and focus in or out slightly. The star will de-focus into a doughnut shape with a few bright rings which should be perfectly concentric when collimated. If the rings are asymmetric then you have to use the knobs at the back of the scope to align the mirror. You have to re-center the star after adjusting and checking again. There should be instructions on how to use the knobs in the scopes manual. There are screws that lock the mirror in position which should be loosened first. You then use the adjustment knobs and re-tig
  11. Hi All, I have used the NexStar 114 which is also a Bird-Jones 1000mm FL 114mm diameter scope and it seems the collimation is critical for getting a good image. Though the primary is spherical it has a short focal length and my guess is that there is a lot of off axis aberration - so the mirror has to be aligned to the lens in the draw tube. Best
  12. Hi PATRIOT SKYNET, Your scope is not the most ideal for planets. You will have to use your highest power eyepieces to get good views of the planets and you should be able to see some detail on Mars, Jupiter and Saturn when the conditions are favorable. Uranus and Neptune will be tiny disks with no detail and you would be lucky to see Pluto at all. However you will have to learn how to collimate the scope to get the best views as this instrument is quite sensitive to misalignment. It is an excellent scope for wide field low power views of star clusters and the Milky Way so I would suggest
  13. Hi Silent Running, no I didn't get the field derotator. So far I have just taken short up to 30 second exposures and stacked them with the software doing the derotation. I would like to hear from someone who as experience with the device to know how practical and easy it will be to use. Best
  14. Hi Silent Running, no I didn't get the field derotator. So far I have just taken short up to 30 second exposures and stacked them with the software doing the derotation. I would like to hear from someone who as experience with the device to know how practical and easy it will be to use. Best Meant to quote Silent Running's post...
  15. Well now I can see that while the colors on my laptop are faded as compared to my Samsung phone, they actually do appear pink here as well. I adjusted the color curves with Gimp and I think they are improved.
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