Yes, it has to radiate more than it takes in because it doesn't have a star. On Friday, October 11, 2013 4:47 PM, Bruce Hugo <bruce.hugo@yahoo.com> wrote: I believe Jupiter radiates more energy than it receives from the sun. Probably the rogue planet does the same. Bruce ------------------------------ Date: Fri, 11 Oct 2013 13:31:16 -0700 (PDT) From: Joe Bauman <josephmbauman@yahoo.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Subject: Re: [Utah-astronomy] Free floating planet just 80 lys away! Message-ID: <1381523476.33434.YahooMailNeo@web125105.mail.ne1.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 To me it sounds more like a brown dwarf than a planet, especially since it radiates energy mostly in the infrared. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".