Author: Sinukoff E. Fulton B. Scuderi L. Gaidos E.
Publisher: Springer Publishing Company
ISSN: 0038-6308
Source: Space Science Reviews, Vol.180, Iss.1-4, 2013-12, pp. : 71-99
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Abstract
The Solar System includes two planets—Mercury and Mars—significantly less massive than Earth, and all evidence indicates that planets of similar size orbit many stars. In fact, one of the first exoplanets to be discovered is a lunar-mass planet around a millisecond pulsar. Novel classes of exoplanets have inspired new ideas about planet formation and evolution, and these “sub-Earths” should be no exception: they include planets with masses between Mars and Venus for which there are no Solar System analogs. Advances in astronomical instrumentation and recent space missions have opened the sub-Earth frontier for exploration: the
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