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Access through your institution Buy or subscribe Some of the first exoplanets identified as candidates for habitable worlds turn out to be mirages conjured up by magnetism on their host
star. Earlier studies looked at tiny changes in the motion of the star Gliese 581 and concluded that at least five planets must circle it. Of these, two planets, dubbed GJ 581d and GJ 581g,
were thought to be at a distance that would allow liquid water to exist on their surface. But a team led by Paul Robertson of Pennsylvania State University in University Park studied
emissions from hydrogen in the star's spectrum and discovered magnetic disturbances within Gliese 581. This is a preview of subscription content, access via your institution ACCESS
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institutional subscriptions * Read our FAQs * Contact customer support RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE The exoplanets that were not.
_Nature_ 511, 128 (2014). https://doi.org/10.1038/511128b Download citation * Published: 09 July 2014 * Issue Date: 10 July 2014 * DOI: https://doi.org/10.1038/511128b SHARE THIS ARTICLE
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