资讯

A group of astronauts whizzing around Earth from orbit are getting some pretty spectacular views of our planet's poles – and SpaceX is sharing a look. The four international astronauts are on a ...
Karol Wójcicki points out that so far no spacecraft with people on board has traveled in an orbit with a 90-degree inclination, allowing it to fly over the North and South Poles of Earth.
In orbit, a spacecraft like the SpaceX Crew Dragon carrying the astronauts is whizzing around the Earth at more than 17,000 miles per hour. At that speed, a spacecraft needs to dissipate a lot of ...