Exploratio6 - moon Triton later the same day. [126] The...

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Exploration Illustration of Voyager 2 passing Neptune in 1989. Voyager 2 's closest approach to Neptune occurred on August 25, 1989. Since this was the last major planet the spacecraft could visit, it was decided to make a close flyby of the moon Triton, regardless of the consequences to the trajectory, similarly to what was done for Voyager 1 's encounter with Saturn and its moon Titan . The images relayed back to Earth from Voyager 2 became the basis of a 1989 PBS all-night program, Neptune All Night . [125] A Voyager 2 mosaic of Triton During the encounter, signals from the spacecraft required 246 minutes to reach the Earth. Hence, for the most part, the Voyager 2 mission relied on pre-loaded commands for the Neptune encounter. The spacecraft performed a near-encounter with the moon Nereid before it came within 4400 km of Neptune's atmosphere on August 25, then passed close to the planet's largest
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Unformatted text preview: moon Triton later the same day. [126] The spacecraft verified the existence of a magnetic field surrounding the planet and discovered that the field was offset from the centre and tilted in a manner similar to the field around Uranus. The question of the planet's rotation period was settled using measurements of radio emissions. Voyager 2 also showed that Neptune had a surprisingly active weather system. Six new moons were discovered, and the planet was shown to have more than one ring. [57] [126] In 2003, there was a proposal to NASA 's "Vision Missions Studies" to implement a " Neptune Orbiter with Probes " mission that does Cassini-level science without fission-based electric power or propulsion. The work is being done in conjunction with JPL and the California Institute of Technology...
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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