A spacecraft designed to go into orbit, especially one not intended to land. Compare with lander.
- This smart software can be used on all kinds of spacecraft, including orbiters, landers and rovers.
- The program would start with lunar orbiters, which would be followed by landers and rovers, and eventually sample return missions.
- They may involve several independent elements, such as orbiters, sub-satellites, landers, rovers, penetrators, airborne robots, planetary ascent vehicles or re-entry vehicles.
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