Detection of Planets Orbiting Sun-Like Stars

Details Detection of Planets Orbiting Sun-Like Stars Detection of Planets Orbiting Sun-Like Stars

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996asbi.work....9m&link_type=abstract

Astrobiology Workshop: Leadership in Astrobiology, p. A9

Biology

Exobiology, Planetary Systems, Protoplanets, Solar System, Sun, Doppler Effect, Space Exploration

Scientific paper

During the past 11 months, astronomers have finally discovered planets orbiting Sun-like stars. A total of eight planets has been detected by the Doppler technique, and there are possible planets detected by astrometry around one other star. Some of the new planets exhibit properties similar to those in our Solar System. But many of them have properties that were unexpected. Several planets are more massive than Jupiter, and some orbit their host star in orbits smaller than Mercury's orbit. Equally unexpected is that three of these planets have noncircular orbits. Current theory of the formation of planetary systems is challenged to account for these new planetary properties, but several models are emerging, involving gravitational scattering of planetesimals and viscous or tidal decay of orbits. The occurrence rate of true analogs of our Solar System will soon be determined with the detection of long-period gas giants analogous to Jupiter.

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