From Sep 17, 2021.

A supernova first observed in 2016 will be replayed in a few years because of the light’s journey through a galaxy cluster and how dark matter gravitationally warps space-time. Plus, inactive centaurs, a Scottish ice wall, and a review of “Countdown: Inspiration4 Mission to Space”.

 

Dundee under ice: a view of Tayside during the ice age.

https://www.youtube.com/watch?v=qRYDYKB2yRg

 

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