Astrometric solar-system anomalies
@inproceedings{Anderson2009AstrometricSA, title={Astrometric solar-system anomalies}, author={J. Anderson and M. Nieto}, year={2009} }
There are at least four unexplained anomalies connected with astrometric data. Perhaps the most disturbing is the fact that when a spacecraft on a flyby trajectory approaches the Earth within 2000 km or less, it often experiences a change in total orbital energy per unit mass. Next, a secular change in the astronomical unit AU is definitely a concern. It is reportedly increasing by about 15 cm yr −1 . The other two anomalies are perhaps less disturbing because of known sources of… Expand
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