According to Grossman, the claim that the RTG design has been used without any incident is also false. Out of 27 missions with this design, there have been three mishaps, including a 1964 satellite whose two pounds of plutonium were dispersed and detected around the planet. With more than 30 times as much plutonium, the hazards of Cassini are far greater. Because Cassini will travel so far from the sun that there won t be enough light for solar energy. Again, not true, says Grossman.
Museums have to be honest.