Mysterious Force slows Pioneer 10

Mysterious Force slows Pioneer 10: "As it moves further away from our solar system, pioneer 10 is slowing down. A mysterious force is reducing its speed by 6 mph per century. Not much, but baffling when you consider that effects like gravity and solar radiation decrease rapidly with distance. Other possibilities have also been ruled out."

The above was posted via to Radio and then to blogger from Radio’s blogger bridge. Very cool.