I think Shaviv and his colleagues will eventually be awarded the Nobel Prize for this work. But the politics for that to happen anytime some are not favorable. The travel of our solar system through the spiral arms of the our galaxy is in excellent agreement with the paleo temperature record but the paleo temperature record does not agree with the paleo atmospheric CO2 content. This is only one fatal flaw in the Hansen Hypothesis. I know of at least two other fatal flaws. Shaviv also has proposed a mechanism for cloud formation caused by aerosol nucleation initiated by solar atmospheric ion flux.