BBCNews, 15 May, 2001, Mystery force tugs distant probes Citat: "...The unexplained force appears to be acting on four deep-space probes scattered around the Solar System....The puzzle is that Pioneer 10 is slowing more quickly than it should...."
June 19, 2003, sciencedaily.com: Berkeley Lab Physicist Challenges Speed Of Gravity Claim Citat: "...According to Einstein's General Theory of Relativity, light and gravity travel at the same speed, about 186,000 miles (300,000 kilometers) per second. Most scientists believe this is true but the assumption was that it could only be proven through the detection of gravity waves..."
