Hayabusa Probe Arrives at Destination
david.given writes "The Japanese space probe Hayabusa has just arrived at its destination, the asteroid Itokawa, and is taking pictures. The largely autonomous ion-drive powered vehicle was launched in 2003 and was supposed to have arrived last year, but a solar flare damaged the solar panels causing a reduction in power. It will study the asteroid for two months before collecting a sample from the surface and departing for Earth, which it should reach in 2007. It's a pity that NASA's asteroid rover, which Hayabusa was going to drop off, got cancelled due to budgetry constraints..."
Hayabusa includes the Minerva hopper - gravity on asteroids is so slight that you can get around on springs - no rockets or NASA rovers required. That's the key - that's why planetary exploration makes so little sense - when you can get to an asteroid and mine it - and return for a small fraction of the delta-V required to get back from the moon, or Mars.