资讯
Without new landers or rovers, it's helicopters or bust for NASA's Mars program
📌 概要
NASA's cost estimate for SR-1 Freedom is $2.1 billion, but that doesn't include the helicopters.
⚡ 关键要点
- ▸NASA's cost estimate for SR-1 Freedom is $2.1 billion, but t
NASA's cost estimate for SR-1 Freedom is $2.1 billion, but that doesn't include the helicopters.