= Michel Mayor
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= M. Mayor
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<Michel Mayor> develops precise stellar <radial velocity> measurements and their use in searches for unseen companions. With <Didier Queloz>, he reported a planetary companion to <51 Pegasi> in 1995.
The host <star>'s regularly changing <Doppler shift> revealed its reflex <motion> around a shared <center of mass>. The approximately four-day <orbital period> showed that a giant <planet> could exist much closer to its host <star> than the giant <planets> of the <Solar system>. The discovery made this previously unexpected orbital arrangement an observational constraint on <planet formation>.<A Jupiter-mass companion to a solar-type star by Michel Mayor and Didier Queloz>[pp. 355–359: ELODIE measurements and short-period planetary companion]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Michel%20Mayor%20%28cropped%29.jpeg?width=250]
{title=Portrait of <Michel Mayor>}
{description=Thor Nielsen / NTNU; source distributed by ESA. https://creativecommons.org/licenses/by-sa/2.0/[CC BY-SA 2.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Michel_Mayor_(cropped).jpeg}
{width=250}
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