Yeah it was the fact that they could power wash the roof clean and then use it as a collection mechanism, and it was high enough to be isolated from other sourc

Yeah it was the fact that they could power wash the roof clean and then use it as a collection mechanism, and it was high enough to be isolated from other sources of dust. I think this is the same amateur astronomer I was reading about: https://www.cbc.ca/radio/quirks/september-30-2018-1.4312266/your-rooftop-could-be-sprinkled-with-cosmic-star-dust-1.4312284 https://www.cbc.ca/radio/quirks/september-30-2018-1.4312266/...