What is a planet

  title={What is a planet},
  author={S. Soter},
  journal={Scientific American},
  • S. Soter
  • Published 2006
  • Physics, Computer Science
  • Scientific American
  • A planet is an end product of disk accretion around a primary star or substar. I quantify this definition by the degree to which a body dominates the other masses that share its orbital zone. Theoretical and observational measures of dynamical dominance reveal gaps of 4‐5 orders of magnitude separating the eight planets of our solar system from the populations of asteroidsand comets. The proposed definition dispenses withupper and lower mass limits for a planet. It reflects the tendency of disk… CONTINUE READING
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