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"Losing the Sky" event this evening

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Forthimage's picture
Last seen: 17 hours 52 min ago
Joined: 08/01/2020 - 14:44
"Losing the Sky" event this evening

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's picture
Last seen: 15 hours 22 min ago
Joined: 10/01/2013 - 12:42
His book is also worth reading!

I would add that Andy Lawrence's book of the same title is also well worth a read:

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.

Paul A Brierley's picture
Last seen: 2 days 17 hours ago
Joined: 05/03/2014 - 19:46
Losing the Sky

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's picture
Last seen: 17 hours 19 min ago
Joined: 02/07/2015 - 21:35
Losing the sky

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

nickjames's picture
Last seen: 4 hours 24 min ago
Joined: 12/10/2013 - 18:16
Satellite trails on images

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's picture
Last seen: 17 hours 19 min ago
Joined: 02/07/2015 - 21:35

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