How common are Earths? How common are Jupiters?

  title={How common are Earths? How common are Jupiters?},
  author={C. Lineweaver and Daniel Grether and Marton G. Hidas},
  journal={arXiv: Astrophysics},
Among the billions of planetary systems that fill the Universe, we would like to know how ours fits in. Exoplanet data can already be used to address the question: How common are Jupiters? Here we discuss a simple analysis of recent exoplanet data indicating that Jupiter is a typical massive planet rather than an outlier. A more difficult question to address is: How common are Earths? However, much indirect evidence suggests that wet rocky planets are common. 

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