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Space probes feel cosmic tug of bizarre forces
There's an article about the Pioneer anomaly in today's Observer.
http://www.guardian.co.uk/life/science/story/0,12996,1302722,00.html -- What have they got to hide? Release the ESA Beagle 2 report. Remove spam and invalid from address to reply. |
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Jonathan Silverlight
wrote: There's an article about the Pioneer anomaly in today's Observer. http://www.guardian.co.uk/life/science/story/0,12996,1302722,00.html Interesting, looks like some folks are trying to get ESA backing for a mission to check on the anomaly. Anybody know if Gravity Probe B might provide some insight into to the Pioneer anomaly? I know it'll remain close to Earth, but it is a phenomenally accurate instrument. Tim -- Guns Don’t Kill People, Rappers Do. |
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Tim Auton wrote:
Jonathan Silverlight wrote: There's an article about the Pioneer anomaly in today's Observer. http://www.guardian.co.uk/life/science/story/0,12996,1302722,00.html Interesting, looks like some folks are trying to get ESA backing for a mission to check on the anomaly. Anybody know if Gravity Probe B might provide some insight into to the Pioneer anomaly? I know it'll remain close to Earth, but it is a phenomenally accurate instrument. Tim Doubtful. In their original paper, Anderson et al analysed the Galileo and Ulysses data out at Jupiter and found that at this distance from the Sun, the anomaly was swamped by the effects of the solar wind. (See http://arxiv.org/abs/gr-qc/104064) Regards Chef! |
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In message , Chef!
writes Tim Auton wrote: Jonathan Silverlight wrote: There's an article about the Pioneer anomaly in today's Observer. http://www.guardian.co.uk/life/science/story/0,12996,1302722,00.html Interesting, looks like some folks are trying to get ESA backing for a mission to check on the anomaly. Anybody know if Gravity Probe B might provide some insight into to the Pioneer anomaly? I know it'll remain close to Earth, but it is a phenomenally accurate instrument. Tim Doubtful. In their original paper, Anderson et al analysed the Galileo and Ulysses data out at Jupiter and found that at this distance from the Sun, the anomaly was swamped by the effects of the solar wind. (See http://arxiv.org/abs/gr-qc/104064) But isn't Gravity Probe B nice and snug below the Van Allen belt? You won't get the same steady acceleration, but it will be very interesting if there is some unexplained residual in the results. BTW, Gravity Probe B has got all the headlines because it took so long to launch and cost so much, but there was a Gravity Probe A a few years ago. I just don't think they will get a dedicated mission. The best they can hope for is an experiment on the New Horizons Pluto probe, if it's launched and if it's suitable. And IMO Cassini has already produced evidence against a Pioneer effect. Anderson et al disagree, but it carried an experiment for this sort of work and that experiment shows no unexplained residuals. Take this with a pinch of salt - I'm definitely an amateur. |
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"Jonathan Silverlight" wrote
in message ... [snip] But isn't Gravity Probe B nice and snug below the Van Allen belt? You won't get the same steady acceleration, but it will be very interesting if there is some unexplained residual in the results. I could be wrong but ... in principle the gyroscopes are contained within the spacecraft where they are shielded from virtually all external influences, including the solar wind, and the spacecraft is manoeuvred about the gyroscopes. Grim |
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