we-are-star-stuff: Every 26 months there is an opportunity to send a vehicle from Earth to the planet Mars along an efficient, low-energy trajectory. The trip can take six months or more. Probes to Mars often fail; as of July 2012, the success rate
we-are-star-stuff: Every 26 months there is an opportunity to send a vehicle from Earth to the planet Mars along an efficient, low-energy trajectory. The trip can take six months or more. Probes to Mars often fail; as of July 2012, the success rate
