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Has the possibility of the "Pioneer Anomaly" as caused by currently inadequate conceptual models of gravity been put to rest by explaining it as caused by on board thermal radiation ? What is the current status of plans, or a lack thereof, to compare thermal acceleration effects demonstrated by the New Horizons spacecraft with that of Pioneer ?

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    $\begingroup$ See space.stackexchange.com/questions/3591/… and space.stackexchange.com/questions/15075/… The Pioneer Anomaly has been fully explained by radiation pressure from onboard heat sources. $\endgroup$
    – Hobbes
    Nov 5 '16 at 8:18
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    $\begingroup$ @Hobbes has also already answered the rest of the question about New Horizons as well in the second link in the comment above. So I think this question is 100% answered previously. If you just click the new-horizons tag you can see the question right below yours. It's a good question! It seems that since the "Pioneer Anomaly" can be explained by carefully modeling the temperature AND emissivity distributions on the spacecraft, there's no big science motivation to look again. $\endgroup$
    – uhoh
    Nov 5 '16 at 10:28

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