The Pioneer Anomaly
The Pioneer anomaly refers to the unexpected deceleration of the Pioneer 10 and 11 spacecraft as they traveled through the Solar System. Initially thought to indicate a new physical phenomenon, the anomaly has since been explained by the anisotropic radiation pressure resulting from the spacecraft's heat loss. Detailed analyses have shown that once thermal radiation forces are accounted for, the anomaly disappears, reaffirming existing physical laws.
- ▪The Pioneer anomaly was first noticed in 1980 but was not seriously investigated until 1994.
- ▪The spacecraft experienced an unexplained acceleration towards the Sun of (8.74±1.33)×10−10 m/s2.
- ▪By 2012, research concluded that the anomaly was due to thermal radiation pressure, not new physics.
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Toggle the table of contents Pioneer anomaly 24 languages БеларускаяCatalàČeštinaDanskDeutschEspañolEuskaraفارسیSuomiFrançaisעבריתMagyarՀայերենItaliano日本語한국어NederlandsNorsk bokmålPolskiPortuguêsРусскийSvenskaTürkçeУкраїнська Edit links ArticleTalk English ReadEditView history Tools Tools move to sidebar hide Actions Read Edit View history General What links hereRelated changesUpload filePermanent linkPage informationCite this pageGet shortened URL Print/export Download as PDFPrintable version In other projects Wikidata item Appearance move to sidebar hide From Wikipedia, the free encyclopedia Deviation in spacecraft deceleration The Pioneer anomaly, or Pioneer effect, was the observed deviation from predicted accelerations of the Pioneer 10 and Pioneer 11 spacecraft after they passed…
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