interplanetary orbit
71Mariner 4 — Operator NASA Mission type Flyby Flyby of Mars …
72Voyager 2 — For the phone sometimes referred to as the Voyager 2, see LG enV touch. Voyager 2 Voyager spacecraft Operator …
73Venus — This article is about the planet. For other uses, see Venus (disambiguation). Venus   …
74Mir — This article is about the Soviet/Russian space station. For other uses, see Mir (disambiguation). Mir …
75Mars Observer — Artist rendering of Mars Observer in orbit around Mars. Operator NASA / JPL …
76Manned mission to Mars — Concept for NASA Design Reference Mission Architecture 5.0 (2009) A manned mission to Mars has been the subject of science fiction, engineering, and scientific proposals throughout the 20th century and into the 21st century. The plans comprise… …
77Magellan (spacecraft) — Magellan Artist s depiction of Magellan at Venus Operator NASA / JPL Major contractors Martin Marietta / Hughes Aircraft …
78Space debris — populations seen from outside geosynchronous orbit (GEO). Note the two primary debris fields, the ring of objects in GEO, and the cloud of objects in low earth orbit (LEO) …
79Space exploration — is the use of astronomy and space technology to explore outer space. [cite web | url = http://adc.gsfc.nasa.gov/adc/education/space ex/exploration.html | title = How Space is Explored | publisher = NASA] Physical exploration of space is conducted …
80Delta-v budget — (or velocity change budget) is an astrogation term used in astrodynamics and aerospace industry for total delta v (or total velocity change) requirements for the various propulsive tasks and orbital maneuvers over phases of a space mission.… …
