The real reason why the Pioneer spacecrafts appear to be slowing down

Back in July we reported on a new theory explaining why both Pioneers 10 and 11 were decelerating at a rate that seemed to defy Newtonian physics. The answer, it seemed, had to do with heat from the electrical subsystems and the decay of plutonium which was pushing back on the craft. But now, a researcher from the… » 10/10/12 6:40am 10/10/12 6:40am

Scientists finally figure out why the Pioneer probes appeared to defy…

It was a mystery that threatened to overturn over a hundred years of scientific canon. How was it that both Pioneer spacecraft were traveling slower through space than predicted by physics? The answer, it turns out, had little to do with Newton or Einstein, and more to do with poorly thought out spacecraft design. » 7/25/12 2:27pm 7/25/12 2:27pm