If I have weird readers it's only because I'm pretty weird! Thanks for the nice note, Jim. I very much appreciate your comments. -- Joe --- On Wed, 4/8/09, Jim Gibson <jimgibson00@yahoo.com> wrote: From: Jim Gibson <jimgibson00@yahoo.com> Subject: Re: [Utah-astronomy] Jupiter's Age To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, April 8, 2009, 6:04 AM Joe, Your article, The Age of Jupiter, helped me clear up a misunderstanding I had about protoplanetary disks. Years ago when I first read about protoplanetary disks and saw this picture http://www.seds.org/hst/OrionProplyds.html I failed to grasp that there was a star inside the dense pollywog nebula there. I thought it was a protoplanet on it’s way to star formation but the nearby star (not seen) was blasting away much of its material preventing it from completing it’s course to becoming a star and hence causing the pollywog formation. I see now that I missed the point because there was more going on than I realized. Had the pollywog been a round flat disk I may have seen what was really going on there. Funny, you write a nice article about Jupiter and I learn about pollywogs. You have some weird readers Joe. Jim _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com