Have scientists ever detected the expansion of space in the solar system using the Voyagers?

Question

It must be *really* tiny!

Answer 1

There is an anomolous shift in the observed frequency from these far out spacecraft.

http://arxiv.org/abs/gr-qc/0610034

"Does PIONEER measure local spacetime expansion?"

Note: Not published yet, just on the archive

They examine two possiblities. One is to low to match the observed, the other is the right magnitude but the sign is reversed.

Answer 2

The Voyager spacecrafts were not designed to search for the expansion of space. However, the fact that the universe is expanding has been seen countless times--first by Edwin Hubble in 1929. As stars and galaxies move away from us, they appear more red-shifted. Hubble discovered that almost all galaxies are red-shifted meaning almost all galaxies are moving away from us--thus the universe must be expanding (think of the universe as the surface of a balloon--as the balloon fills with air, all points on the surface move away from each other. This is similar to what is happening to our universe). Recent evidence even says that the universe is expanding at an ever increasing rate.