Sub-orbital flight
From Wikipedia, the free encyclopedia.

A sub-orbital flight is a spaceflight that does not involve putting a vehicle into orbit. Sub-orbital flights have been undertaken to test spacecraft and launch vehicles intended for later orbital flight, but some vehicles, such as the X-15 and SpaceShipOne have been designed exclusively to reach space sub-orbitally.

The original article can be found at: http://en.wikipedia.org/wiki/Sub-orbital_flight.
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