| 11. | The orbiter is identical to the Venera 9 bus or orbiter.
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| 12. | The orbiter mapped the comet in anticipation of detaching its lander.
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| 13. | The mission included an orbiter, surface stations and surface penetrators.
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| 14. | The orbiter has been orbiting Mars since September 24, 2014.
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| 15. | The orbiter returned to Kennedy Space Center on 16 February 1992.
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| 16. | Each orbiter was intended to make 25 flights prior to retirement.
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| 17. | Shuttle Orbiter ISS generic reboost had 232 kg of fuel available.
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| 18. | He helped co-design two of the Lunar Orbiter spacecraft.
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| 19. | Usually, five to seven crew members ride in the orbiter.
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| 20. | Both probes data are to be relayed to a Titan orbiter.
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