Ultra-short-period planets

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Ultra-short-period planets are a class of planets with orbital periods below 1.0 (earth) day and occur only around stars of less than 0.88 solar mass.^[1] They orbit closer to stars than any other described planetary object.

5 ultra-short-period planets have been identified in the region of the Milky Way known as the galactic bulge, they were observed by the Hubble Space Telescope and first described by researchers from the Space Telescope Science Institute, the Universidad Catolica de Chile, Uppsala University, the High Altitude Observatory, the INAF–Osservatorio Astronomico di Padova and the University of California at Los Angeles.^[1]

[edit] References

1. ^ ^{a b} Sahu, K.C. et al. 2006. Transiting extrasolar planetary candidates in the Galactic bulge. Nature 443:534-540