September 17, 2004
Something's tugging at Pioneer probes
As bizarre as this may sound, it appears as though the Pioneer 10 and 11 space probes are having a hard time leaving the outer extremes of our solar system. Launched over 30 years ago, at looks as if some kind of mysterious force is holding them back as they try to sweep out of the solar system.
Some scientists believe that the unseen "dark matter" which may permeate the universe is what is influencing the Pioneers' passage. Others say flaws in our understanding of the laws of gravity best explain the crafts' wayward behavior.
Hold on to your Newtonian dynamics and Einsteinian relativity caps before they blow off....