See also sulphur such as this discussion:

https://news.ycombinator.com/item?id=37008034

And also YC linked Make Sunsets:

https://www.technologyreview.com/2022/12/24/1066041/a-startu...

And of course the excellent novel Termination Shock:

https://en.m.wikipedia.org/wiki/Termination_Shock_(novel)