UNH has been involved in space science for 64 years, so they put together a cool graphic about it, with bragging numbers like 36 current satellites have UNH instruments on board, and the fact that they manage the magnetometer on Voyager I, which is now 13 billion miles away.
But it’s the doughnuts that caught my attention. They’ll catch yours, too, if you click through.
Return to the Concord Monitor
I question the math. Rest mass of the electron is 9.1e-31 kg. Multiply by 1.0e30, result is 0.91 kg. Or slightly over two pounds. So the theoretical donuts weigh a pound each? As Marty McFly would say: Heavy!
I may be missing something, but I don’t see what.
Note that a lot of the belt electrons are highly relativistic, so their mass is actually more than that.