3 ms·

I like physics, but as a layman I have no idea what they are demonstrating. (Something to do with relativity, got that...) A little background information would

• idlewords 17y ago
  One of the predictions of General Relativity is that a spinning massive body will drag neighboring spacetime along with it - that is, impart a bit of the spin to anything nearby. See http://en.wikipedia.org/wiki/Frame_dragging http://en.wikipedia.org/wiki/Frame_dragging This is a very subtle effect if you don't have a neutron star or black hole around, but using gyroscopes built to crazy tolerances, this experiment appears to have demonstrated it (at a head-spinning cost).