Definitions

1. For an orbital spaceflight, a spacecraft enters a closed orbit around the planetary body. (Web site)
2. To achieve orbital spaceflight, the tangential velocity around the Earth is as important as altitude.

High Speeds

1. Due to the high speeds of orbital spaceflight, atmospheric reentry is much more difficult compared to sub-orbital flights.

Launch Vehicles

1. Orbital spaceflight from Earth has only been achieved by launch vehicles that use rocket engines for propulsion.

Sub-Orbital Spaceflight

1. To perform an orbital spaceflight, a spacecraft must go higher and faster than for a sub-orbital spaceflight. (Web site)

Orbital Spaceflight

1. Some sub-orbital flights have been undertaken to test spacecraft and launch vehicles later intended for orbital spaceflight. (Web site)
2. For orbital spaceflight s, spacecraft enter closed orbit s around the Earth or around other celestial bodies.
3. Some sub-orbital flights have been undertaken to test spacecraft and launch vehicle s intended for later orbital spaceflight. (Web site)

Categories

1. Sub-Orbital Spaceflight
2. Launch Vehicles
3. Astronomy > Universe > Space > Spacecraft
4. High Speeds
5. Books about "Orbital Spaceflight" in Amazon.com
   

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