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| rdfs:comment | - The Mars Observer spacecraft, also known as the Mars Geoscience/Climatology Orbiter, was a robotic space probe launched by NASA on September 25, 1992 to study the Martian surface, atmosphere, climate and magnetic field. During the interplanetary cruise phase, communication with the spacecraft was lost on August 21, 1993, 3 days prior to orbital insertion. Attempts to re-establish communication with the spacecraft were unsuccessful.
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| Footer | - Investigators believe oxidizer leaked through check valves and mixed with fuel when pyro-valves 5 and 6 were opened.
- The complement of instruments on Mars Observer would have provided a large amount of information about Mars.
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| interplanetary | |
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| Mission Duration | |
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| Caption | - (Loss of telemetry)
- (Suspected failure)
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| Image caption | - Artist rendering of Mars Observer in orbit around Mars.
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| Alt | - Artistic depiction of the spacecraft in orbit
- Diagram of the mapping cycle
- Diagram of the orbital insertion maneuver
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| Image | - Mars Observer - loss of telemetry.png
- Mars Observer - mapping phase.png
- Mars Observer - orbit insertion.png
- Mars Observer 2.jpg
- Mars Observer - bipropellant system failure diagram.png
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| abstract | - The Mars Observer spacecraft, also known as the Mars Geoscience/Climatology Orbiter, was a robotic space probe launched by NASA on September 25, 1992 to study the Martian surface, atmosphere, climate and magnetic field. During the interplanetary cruise phase, communication with the spacecraft was lost on August 21, 1993, 3 days prior to orbital insertion. Attempts to re-establish communication with the spacecraft were unsuccessful.
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