That's really interesting. Back in my college days, the lab next to me would run experiments that would routinely pickup vibrations from the road nearby. Even w

That's really interesting. Back in my college days, the lab next to me would run experiments that would routinely pickup vibrations from the road nearby. Even when stabilized on an actively controlled optical table. Which isn't that big of a deal, their experiments would run for a few hours. So they would run it in the middle of the night. The telescope lab is directly under a stadium, their process for a single mirror is several months/years long. I wonder how they manage their process. Do they just pause and continue once the people leave? I also wonder how damaging the starts and stops (if they do it) are to the final quality of the product.