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    Why Are There More Tabby's Stars? With Dr. Ed Schmidt
    https://www.youtube.com/watch?v=wF8DMGTmOCc

    Re. the physical clustering, I am wondering whether there's any correlation between the brightness variations of the separate stars in a cluster. Perhaps such correlations should be windowed by the light transit time between pairs - which would mean an observing program of many years duration, unfortunately.
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    The guts of JWST
    https://www.youtube.com/watch?v=MzWfUK0yvdY

    A symphony of tech.
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    The Engineering of the Parker Solar Probe
    https://www.youtube.com/watch?v=pOZhPz92Dic

    Some nifty material science here
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      CommentAuthorTrim
    • CommentTimeMar 9th 2022
     
    Is the Proxima System Our Best Hope For Another Earth? - YouTube

    https://m.youtube.com/watch?v=LHhFFfv20-4
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      CommentAuthorAngus
    • CommentTimeMar 31st 2022
     
    No aurora here yet. Anybody else?
    • CommentAuthorAsterix
    • CommentTimeApr 8th 2022
     
    Thingummy detected 13.5B LY away

    Not exactly sure what it is, er was.
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    https://www.centauri-dreams.org/2022/04/19/good-news-for-a-gravitational-focus-mission/
    My fave astronomical mission proposal
    We conclude that an imaging mission is challenging but feasible, using technologies that are either already available or in active development. Under realistic conditions, megapixel imaging of Earth-like exoplanets in our galactic neighborhood requires only weeks or months of integration time, not years as previously thought.

    https://arxiv.org/abs/2204.04866
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      CommentAuthorTrim
    • CommentTimeApr 19th 2022
     
    Excellent find Andrew, you do have your used sometimes.
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    • CommentAuthorAsterix
    • CommentTimeMay 3rd 2022
     
    In order to capture an exoplanet image through the solar gravitational lens, a telescope would have to be placed at least 14 times farther away from the sun than Pluto, past the edge of our solar system, and further than humans have ever sent a spacecraft. But, the distance is a tiny fraction of the light-years between the sun and an exoplanet.


    Details, details...
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      CommentAuthorAngus
    • CommentTimeMay 3rd 2022
     
    How do you get the planet to sit still for the weeks or months of integration time?
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    Posted By: AsterixDetails, details...
    If you want a closer minimum focal length, simply chose a bigger star.
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    Posted By: AngusHow do you get the planet to sit still for the weeks or months of integration time?
    By using a Canute Field,
    • CommentAuthorAsterix
    • CommentTimeMay 3rd 2022 edited
     
    Posted By: Andrew Palfreyman
    Posted By: AsterixDetails, details...
    If you want a closer minimum focal length, simply chose a bigger star.


    Well, that's the problem, innit? I'd guess that the nearest red giant (or any star outside of Sol) has a focal length that's too short.
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    Would you mind defining "too short"?

    The gravitational focus is a line of semi-infinite length.

    600 AU ish is not an insurmountable problem. A NASA mission architecture is being developed which uses a "string of pearls" idea.
    • CommentAuthorAsterix
    • CommentTimeMay 4th 2022
     
    Let's take Barnard's star as a close candidate. 6 LY away. What's the focal length?
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      CommentAuthorAngus
    • CommentTimeMay 4th 2022
     
    I still want to know how you form an image using the incoherent addition of multiple intensity maps of a spinning object as formed by some algorithm that does an incoherent deconvolution of a completely ridiculous lens function.