Other
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21830801f&link_type=abstract
American Astronomical Society, AAS Meeting #218, #308.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Before 1995, humanity had no evidence that planets existed around other stars. Then, a bizarre gas giant planet, 51 Peg b, was discovered in an orbit where it could not have possibly formed, just ten stellar radii away from it's host star. In the past 15 years, hundreds of planets have been discovered by gravitational and photometric techniques. To explain the incredible diversity of orbits and planet densities, the simplicity of the old solar nebula model must be replaced with chaotic gravitational interactions that trigger planetesimal migration. This revision has helped to solve some of the mysteries of our own solar system, but what does it mean for the formation of small rocky planets on temperate, circular orbits? The search for terrestrial planets is far more expensive and technically demanding than surveys for gas giant planets. Fortunately, the bounty of planet candidates from Kepler shows that these low mass planets are common and the hunt for exoplanets has now sharpened into a search for habitable worlds.
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