3 ms·
Can it take off from Mars? In another HN thread a month ago, we discussed how Mars' atmosphere is so thin that a Cessna would need 747 wings and near Mach 1 vel
by stephengillie 14y ago
Can it take off from Mars? In another HN thread a month ago, we discussed how Mars' atmosphere is so thin that a Cessna would need 747 wings and near Mach 1 velocity to take off.
- ricardobeat 14y agoRockets are propelled by their own exhaust.
- wololo 14y agofyi: https://news.ycombinator.com/item?id=4261806 https://news.ycombinator.com/item?id=4261806, https://news.ycombinator.com/item?id=4608595 https://news.ycombinator.com/item?id=4608595