The Pleiades Controversy Erupts Again

[CygnusX-1]

New measurements claim to resolve the controversy over the distance to the Pleiades but have in fact only reignited the debate. See reports at Nature and Science.

 

[Simon Bridge]

It boils down to a competition between a couple of parallax measurements. One on the Earth and another by a satellite. Both by methods highly reliable in every other instance. Thus it is quite intreguing.
It's interesting enough that parralax measurements are down to 1.5% uncertainty.
The gripping hand is that there's another satellite coming.