1/10 of the speed of light is still pretty fast. Helios[1], the probe that holds the speed record from all our spacecrafts travaled at 252 792km/h. That's still

1/10 of the speed of light is still pretty fast. Helios[1], the probe that holds the speed record from all our spacecrafts travaled at 252 792km/h. That's still less than one 1/400 of the 1/10 of the speed of light. 1. http://en.wikipedia.org/wiki/Helios_probes http://en.wikipedia.org/wiki/Helios_probes