Valuable keywords: ship and space are high-value keywords. Popular keywords: space and ship are widely used keywords. Great extension: Uses the .com extension. OrbitalSpacecraft.com Orbital Spacecraft An orbital spaceflight (or orbital flight) is a spaceflight in which a spacecraft is placed on a trajectory where it could remain in space for at least one orbit. To do this around the Earth, it must be on a free trajectory which has an altitude at perigee (altitude at closest approach) above 100…