This new information makes it pretty clear that the cause of the Pioneer Anomaly, that is the deviation of the Pioneer spacecraft from the trajectories dictated by gravity alone, is due to thermal sources internal to the spacecraft. A satisfying result, though it produces no new physics.
These regular blog posts are for educated but non-expert readers who love science. For many years, I regularly sold freelance book reviews to major metropolitan newspapers. Over the past few years, the market for such reviews dried up, but I did not want to leave the field entirely. Fortunately, publishers still send me their catalogs … Read more