We should be farther than this by now but it is a start.
It can soar at 4,000 mph—or five times the speed of sound.
This Hypersonic ‘Space Plane’ Can Get From New York to London in One Hour
Posted in space travel
Posted in space travel
We should be farther than this by now but it is a start.
It can soar at 4,000 mph—or five times the speed of sound.