To date, we have not obtained direct images of planets around other stars. However, the small-amplitude Keplerian motion of stars, presumably caused by the gravitational forces exerted them by planets, now provides information on their masses and orbits. The first...
CITATION STYLE
Marcy, G. W., & Butler, R. P. (1999). Extrasolar Planets: Techniques, Results, and the Future. In The Origin of Stars and Planetary Systems (pp. 681–708). Springer Netherlands. https://doi.org/10.1007/978-94-011-4509-1_20
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