Re: Curiousity
Indeed, not all directions are equal. Draw sun and earth on its orbit on a piece of paper, and look where the terminator (dawn/dusk line) point to: One points in the direction where we're going, and the other one looks behind us. While some boulder rear-ending us is still pretty bad, the speeds of the asteroid and earth subtract, while in a frontal collision they would add up, so this sector is the one where we definitely do not want to see anything coming towards us!
Biting the hand that feeds IT
