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Post Info TOPIC: Voyager 2 mission


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The Voyager 2 spacecraft passed Uranus in 1986.
The closest approach to Uranus occurred on January 24, 1986, when Voyager 2 came within 81,500 kilometres of the planet's cloud tops. 

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Voyager Celebrates 25 Years Since Uranus Visit

As NASA's Voyager 2 spacecraft made the only close approach to date of our mysterious seventh planet Uranus 25 years ago, Project Scientist Ed Stone and the Voyager team gathered at NASA's Jet Propulsion Laboratory, Pasadena, Calif., to pore over the data coming in.
Images of the small, icy Uranus moon Miranda were particularly surprising. Since small moons tend to cool and freeze over rapidly after their formation, scientists had expected a boring, ancient surface, pockmarked by crater-upon-weathered-crater. Instead they saw grooved terrain with linear valleys and ridges cutting through the older terrain and sometimes coming together in chevron shapes. They also saw dramatic fault scarps, or cliffs. All of this indicated that periods of tectonic and thermal activity had rocked Miranda's surface in the past.

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Voyager 2 at 12,000 Days: The Super-Marathon Continues

NASA's plucky Voyager 2 spacecraft has hit a long-haul operations milestone today (June 28) -- operating continuously for 12,000 days. For nearly 33 years, the venerable spacecraft has been returning data about the giant outer planets, and the characteristics and interaction of solar wind between and beyond the planets. Among its many findings, Voyager 2 discovered Neptune's Great Dark Spot and its 450-meter-per-second (1,000-mph) winds.
Voyager 1 will reach this 12,000-day milestone on July 13, 2010 after travelling more than 22 billion kilometres. Voyager 1 is currently more than 17 billion kilometres from the sun.

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U.S. space agency scientists say they have identified the problem that distorted patterns of science data returning from the Voyager 2 spacecraft.
Engineers at NASA's Jet Propulsion Laboratory said the "flip of a bit" in the memory of an onboard computer appears to have caused the disruption. A value in a single memory location was changed from a 0 to a 1.
Officials said they plan to reset the bit to its normal state Wednesday.

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Engineers have shifted NASA's Voyager 2 spacecraft into a mode that transmits only spacecraft health and status data while they diagnose an unexpected change in the pattern of returning data. Preliminary engineering data received on May 1 show the spacecraft is basically healthy, and that the source of the issue is the flight data system, which is responsible for formatting the data to send back to Earth. The change in the data return pattern has prevented mission managers from decoding science data.
The first changes in the return of data packets from Voyager 2, which is near the edge of our solar system, appeared on April 22. Mission team members have been working to troubleshoot and resume the regular flow of science data. Because of a planned roll manoeuvre and moratorium on sending commands, engineers got their first chance to send commands to the spacecraft on April 30. It takes nearly 13 hours for signals to reach the spacecraft and nearly 13 hours for signals to come down to NASA's Deep Space Network on Earth.

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Holiday tidings come from NASA's Voyager 2 this week, offering a view of deep space beyond our sun's solar system.

Now speeding through space at more than 34,000 miles-per-hour, the 1977 space probe resides more than 8.3. billion miles away from the sun. That is twice as far as Pluto. Two years ago, Voyager 2 passed into the region of space where the sun's solar wind peters out as it plows into the interstellar gases of our Milky Way galaxy. And now it's giving us some news from this region, called the "heliosheath," by astrophysicists.
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Flashback to Neptune's Moon Triton
Newly released images commemorate the 20-year anniversary of the Voyager flyby of Neptune's moon Triton on Aug. 24, 2009.
Triton was the last solid object visited by NASA's Voyager 2 spacecraft as it headed toward the edges of our solar system.

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20 years ago, on the 25th August, 1989, the Voyager 2 spaceprobe flew past the planet Neptune.

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Hurtling through space 31 years after its launch, the Voyager 2 spacecraft has sent back the most detailed view yet of the shock wave that marks the thinning of the solar wind, the charged particles streaming from the sun.

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