author={Lorenzo Iorio},
  journal={The Astronomical Journal},
  pages={3615 - 3618}
  • L. Iorio
  • Published 5 November 2008
  • Physics, Geology
  • The Astronomical Journal
The astronomer E. V. Pitjeva, by analyzing with the EPM2008 ephemerides a large number of planetary observations including also two years (2004–2006) of normal points from the Cassini spacecraft, phenomenologically estimated a statistically significant nonzero correction to the usual Newtonian/Einsteinian secular precession of the longitude of the perihelion of Saturn, i.e., ; the formal, statistical error is 0.″0007. It can be explained neither by any of the standard classical and general… 

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The Astronomical Unit now

  • E. Standish
  • Physics
    Proceedings of the International Astronomical Union
  • 2004
The Astronomical Unit is one of the most basic units of astronomy: the scale of the solar system. Yet its long and colorful history is sprinkled liberally with incorrect descriptions and mis-quoted