“Losing the Sky” event this evening

Forums General Discussion “Losing the Sky” event this evening

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    Mark Phillips

    You may have seen this advertised already and Prof. Catherine Heymans was on Radio 4 this morning publicising it, but this important event is happening this evening. It’s free and you can watch in live on YouTube from 7:30pm BST

    Live public discussion with Andy Lawrence, Brian Eno, Catherine Heymans, Mark McCaughrean from ESA, Amy Mehlman from Viasat, and many others.


    Or just go to YouTube directly


    We’ve managed to get together an amazing group of people to talk about this disturbing subject.


    Dominic Ford

    I would add that Andy Lawrence’s book of the same title is also well worth a read: https://www.amazon.co.uk/Losing-Sky-Andy-Lawrence-ebook/dp/B08W9NR7DX

    It’s the best in-depth technical account I’ve seen of what Starlink’s motivations are, how much of a problem it is, and why international regulation doesn’t work.


    SpaceX and others- appear to have a disregard for the impact on Astronomical research when they continually pollute our skies.

    I have seen too many Astro-images that have been captured by the Amature- Astronomical community. Ruined because of these satellites. 

    Daryl Dobbs

    I’ve heard that some of Space x satellites leak into frequencies used by radio astronomy.

    Since March I’ve been following with interest V1405 Cas, I can’t remember a session observing with my binoculars that a satellite didn’t cross my field of view. They are certainly a pest

    Nick James

    Daryl – There are certainly a lot more trails on my images this summer compared to previous years. For imagers the way that you stack subframes can help to a certain extent. The animated GIF attached is the same frame stacked as average and as sigma clip. There are 5 satellite trails on this image, two bright ones and three faint. The sigma clip stack definitely suppresses the bright ones. Photometrically the two stacks are the same. 

    Daryl Dobbs

    Interesting clip, alas with oneweb Starlink etc the problem will get worse, I wonder how professional observatories cope to protect the sensors of their instruments  

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