Kepler-9b
... that the exoplanet Kepler-9b's "year" becomes four minutes longer every time it completes an orbit around its star?
... that the <a href="./Exoplanet" id="mwBgI" rel="mw:WikiLink" title="Exoplanet">exoplanet</a> <b id="mwBgM"><a href="./Kepler-9b" id="mwBgQ" rel="mw:WikiLink" title="Kepler-9b">Kepler-9b</a></b><span about="#mwt32" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"`s","href":"./Template:`s"},"params":{},"i":0}}]}' id="mwBgU" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span>s</span> "<a href="./Orbital_period" id="mwBgY" rel="mw:WikiLink" title="Orbital period">year</a>" becomes four minutes longer every time it completes an orbit around <a href="./Kepler-9" id="mwBgc" rel="mw:WikiLink" title="Kepler-9">its star</a>?