Io, is an X-ray source
... that one of Jupiter's moons, Io, is an X-ray source?
... that one of <a href="./Jupiter" id="mwDIM" rel="mw:WikiLink" title="Jupiter">Jupiter</a><span about="#mwt64" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"`s","href":"./Template:`s"},"params":{},"i":0}}]}' id="mwDIQ" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span>s</span> moons, <b id="mwDIU"><a class="new" data-mw-i18n='{"title":{"lang":"x-page","key":"red-link-title","params":["Io as an X-ray source"]}}' href="./Io_as_an_X-ray_source?action=edit&amp;redlink=1" id="mwDIY" rel="mw:WikiLink" title="Io as an X-ray source" typeof="mw:LocalizedAttrs">Io, is an X-ray source</a></b>?