APOD 2.7

The APOD from the 3rd of January shows a small (.1 mm) metal ball that moves slightly in a vacuum due to energy fluctuations. When I first read that, I thought of the defunct Aether theory, that a substance fills every where in space. Another thing that struck me was the fact that normally the APODs are of very very large things, the smallest I had seen before this was a cloud formation. The fact that a ball invisible to the naked eye could prove that the universe is expanding is quite extraordinary in my view.