The next Mars rover, Curiosity, is scheduled to launch Saturday. It's the first Mars rover to jettison solar panels for nuclear power, meaning it can go places and do things others couldn't.
Gone are the fly's-wing-like solar panels that provided electricity for earlier rovers Spirit and Opportunity.
Instead, the rover for the Mars Science Laboratory, Curiosity, carries 10.6 pounds of plutonium-dioxide pellets. The system is designed to allow the vehicle to operate where sunlight is so weak or the spacecraft's mission is so demanding that solar panels are impractical.
"You can operate with solar panels on Mars, you just can't operate everywhere," said Stephen Johnson, who heads the space nuclear systems technology division at the US Department of Energy's Idaho National Laboratory in Idaho Falls, in a statement. "This gives you an opportunity to go anywhere you want on the planet, not be limited to the areas that have sunlight, and not have to put the rover to sleep at night."
Page 1 of 4