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Voyager 1 Officially Exits Our Solar System

An anonymous reader writes "A new study released today (abstract) indicates that the Voyager 1 spacecraft has become the first man-made object to exit our solar system. Instrumentation data sent back to NASA indicate the historic event likely occurred on August 25, 2012, evidenced by drastic changes in radiation levels as the craft ventured past the heliopause. What remains to be seen, however, is whether Voyager 1 has actually made it to true interstellar space, or whether it has entered a separate, undefined region beyond our solar system. Either way, the achievement is truly monumental. 'It's outside the normal heliosphere, I would say that. We're in a new region,' said Bill Webber, professor emeritus of astronomy at New Mexico State University in Las Cruces. 'And everything we're measuring is different and exciting.'" Update: 03/20 20:44 GMT by S : Reader skade88 points out that the JPL Voyager team is not so sure: "It is the consensus of the Voyager science team that Voyager 1 has not yet left the solar system or reached interstellar space. In December 2012, the Voyager science team reported that Voyager 1 is within a new region called 'the magnetic highway' where energetic particles changed dramatically. A change in the direction of the magnetic field is the last critical indicator of reaching interstellar space and that change of direction has not yet been observed." So we'll probably be hearing about this again in a couple years.

3 of 237 comments (clear)

  1. Take care out there Voyager by ravenswood1000 · · Score: 5, Insightful

    You did really well.

  2. Longevity. by fahrbot-bot · · Score: 5, Insightful

    The fact that this was launched in 1977 and is still operating 36 years later -- 33 years after its primary mission (Jupiter, Saturn encounter) ended in 1980 -- is an achievement in itself and testament to its design and build quality. According to Voyager 1 the 3 RTGs (radioisotope thermoelectric generators) on Voyager 1 will continue to provide sufficient power for some operations until around 2025.

    --
    It must have been something you assimilated. . . .
  3. Newton by stoploss · · Score: 5, Insightful

    Voyager 1 won't escape the Oort cloud (really the outer Oort cloud) for another 14,000 - 28,000 years. (Probably due to running out of power in the next 10 to 15 years.)

    Perhaps I have misinterpreted your statement, but are you aware of Newton's First Law of Motion? Voyager has no need for power to continue its journey; running out of power will have no effect on its velocity.

    My guess is that, aside from attitude adjustment, Voyager hasn't fired its thrusters since its encounter with Titan in 1980.