793
Data centers raise nearby temperatures by up to 4 degrees in Phoenix
(techxplore.com)
This is a most excellent place for technology news and articles.
Yes, that's the plan, tens of thousands of satellites. SpaceX has actually proposed a million of them in the long term, this sort of constellation is one of the things that a launcher like Starship is intended to support.
Starlink is already on this scale and that's just using Falcon 9.