The mission will aim to fly at a 90-degree circular orbit, meaning it will be exactly perpendicular to the equator. While in orbit, the crew plans to observe Earth’s polar regions from about ...

For example, gravitational attraction between the Earth and the Moon keeps the Moon in orbit around the Earth. An object moving in a circular orbit at a constant speed has a changing velocity.

This will be the first human spaceflight to orbit the poles. Flying to a 90-degree circular orbit on a never-before-seen flight trajectory, the flight will take the crew of four explorers over the ...