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Ouroboros

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About Ouroboros

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    South Oxfordshire & North Cornwall Coast

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  1. I think this is a very good question. It’s one reason why I think there’s a good case for a moratorium on any human trips to Mars until robotic probes have determined that there either is or isn’t Martian life. It’s quite possible that we have already contaminated Mars. But one thing we can be pretty sure of is that human exploration will muddy the waters as far as determining whether any life found in the future originated on Mars or on Earth. It might be of course that Martian life is biologically so different that we might be pretty certain it originated on Mars. If on the other hand DNA/
  2. Where might I obtain some extension tubes of the type shown here as 18mm & 15mm? I don’t know what to search for.
  3. Not to be left out here’s my attempt taken in 2016 of M87 and Markovian Chain. The trick to reveal the jet in my data was not to over stretch, which is what the insert shows.
  4. Lovely image. I can’t see the purple fringes on my iPad screen.
  5. OK. Thanks. I’ve learned something here. Can you obtain any spatial information on the source? Or is the object effectively a point source.
  6. I see, I think. Instead of plotting the methanol spectral line as intensity versus frequency you’re converting frequency to velocity relative to the sun’s. Is that right?
  7. Yes, very interesting. Maybe you explain this somewhere above but why is the horizontal axis velocity (km/s)? I might have expected it to be frequency (Hz).
  8. PI runs fine on a mid-2014 MacBook. Struth that’s nearly 7 years old!
  9. Pretty amazing image. The bubble looks very delicate!
  10. Actually although I think solar powered fairy lights and similar dotted about the garden are the height of naffness at least they pump out less light than a several thousand lumen security light.
  11. I haven’t noticed darker skies over the last 12 months or so. I did think the skies were clearer, less hazy, during the first lockdown, which I took to be because of fewer aircraft. I recall something similar happened a few years ago when flights over Europe were cancelled due to a volcanic eruption. If anything, local light pollution has got worse due to DIY enthusiasts locked down at home putting up ever more fancy garden lights and security lighting. Grrrrrr!
  12. But but but but .... is this the same really? Suppose light travels slower on the outward journey and faster on the return. The outward and return directions are different depending on whether the light starts from Alice and returns via Bob to Alice, or starts with Bob and returns via Alice to Bob. A to B and back to A or B to A and back to B. So what would tell the photon to behave differently on the outward and return journeys?
  13. Markarian’s chain of galaxies near Leo might make an interesting target for wide field.
  14. What an excellent video! I have been polar aligning this way in KStars for some time but it’s good to see it explained so well. The producer of the video has several other good tutorial videos too. Good find!
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