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Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Just curious if anyone knew if they had explained the reason for the Pioneer anomaly? I tried searching for explanations for this on the web, but there is so much garbage and misinformation out there on this subject, i can't tell if its really been solved or if its still a mystery . . .
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
According to this they are digging out all the old data to solve it once and for all:
A common factor of those anomalies is that the more "insignificant" forces they add up the smaller the anomaly becomes so my guess is that they will be left with a number that is too small to be statistically significant but large enough for several websites to arise with very imaginative explanations.
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
As I understand it (needless to say, when I look for where I think I saw it, I can't turn up any references), the anomoly only becomes significant once the spacecraft have done their slingshots off the big planets' gravity. Given that this manouvre mulitplies any slight trajectory mis-estimation by orders of magnitude, my vote is for existing physics and the accumulation of small errors.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
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Posts: 3068
Thanks.
Actually, in the article Bjorn listed, it states JPL has already accounted for 50-75% of the anomaly by simulated the effects of thermal emission on the antenna.
Registered Member #32
Joined: Sat Feb 04 2006, 08:58AM
Location: Australia
Posts: 549
Hazmatt_(The Underdog) wrote ...
The problem is very interesting and it makes me wonder if a thermal source could be used as a propulsor and if it is comparable to ion thrusters.
Yes, you could do it. No, it would not rival an ion thrustor simply because photons don't have the same momentum as ions can easily get. (Imagine deflecting an ion beam with a beam of infrared light - or even your own body heat. That would be a cool trick...)
Vigilatny Registered Member #17
Joined: Thu Feb 02 2006, 02:47PM
Location: NL
Posts: 158
Depends on how you mean rival. A self contained photonic thruster would have marginal utility because of the low thrust to mass ratio(unless you start using anti-matter or something). Solar sails(powered by the stars, or giant lasers) on the other hand show some promise. Photonic thrusters would be/are very efficient, perhaps the one of the few feasible interstellar transports mechanisms(where mass efficiency becomes paramount).
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Has the Pioneer Anomaly been solved ? ? ?
