A sub-orbital spaceflight is a spaceflight in which the spacecraft reaches space, but its trajectory intersects the atmosphere or surface of the gravitating body from which it was launched, so that it does not complete one orbital revolution.
For example, the path of an object launched from Earth that reaches 100km (62mi) above sea level, and then falls back to Earth, is considered a sub-orbital spaceflight. Some sub-orbital flights have been undertaken to test spacecraft and launch vehicles later intended for orbital spaceflight. Other vehicles are specifically designed only for sub-orbital flight; examples include manned vehicles such as the X-15 and SpaceShipOne, and unmanned ones such as ICBMs and sounding rockets.
“If a planet orbits too close to its star, any water would evaporate ... The four newly discovered planets orbiting Barnard’s star are all sub-Earth mass planets, a regime that remains largely unexplored beyond the solar system.
...Orbital and the Prodigy on the Hackers soundtrack – and so DeadChannel Sky hops between dance sub-genres, including big-beat (Change the Channel), acid-house (Keep Pushing) and drum’n’bass (Dodger).
... orbital resources ... Hybrid orbit layering. Satellites in 550 km orbits will provide high-bandwidth communications, while those in 340 km very-low orbits will enable sub-second remote sensing responses.
Plans have been 'inked in', with invitations imminent ... She will blast off on the New Shepard — leading an all-female crew of six, including TV anchor Gayle King and pop star Katy Perry — for an 11-minute sub-orbital flight. Like a hen party in space ... .
It's apparently worth upwards of $2.5 million ... She will blast off on the New Shepard — leading an all-female crew of six, including TV anchor Gayle King and pop star Katy Perry — for an 11-minute sub-orbital flight ... 'Uh, yes, one hundred percent ... .