Star motions yield four more planets
Tracking the back-and-forth motion of nearby stars, astronomers recently have found evidence of four extrasolar planets, bringing to 16 the number of planets known to orbit sunlike stars.
References:
1998. Extrasolar planet in double stars system discovered from La Silla. ESO Press Release (Nov. 24). Available at http://www.eso.org/outreach/press-rel/pr-1998/pr-18-98.html.
Fischer, D.A., G.W. Marcy, R. P. Butler, et al. In press. Planetary companions around two solar type stars: HD 195019 and HD 217107.
Further Readings:
Cowen, R. 1998. Exploring new worlds. Science News 154(Aug. 8):88.
Sources:
R. Paul Butler
Anglo-Australian Observatory
P.O. Box 296
NSW 1710 Epping
AustraliaGeoffrey W. Marcy
San Francisco State University
Department of Physics and Astronomy
San Francisco, CA 94132From Science News, Vol. 154, No. 23, December 5, 1998, p. 362. Copyright Ó 1998 by Science Service.
12/5/98
copyright 1998 ScienceService
