This was originally explained away as a meteor. But they don’t generally return for a second try, so it has to be an unknown.
http://www.youtube.com/watch?v=vjMAJ_DCdn4Story Source:
http://www.youtube.com/watch?v=vjMAJ_DCdn4 Dreamland Video podcast
To watch the FREE video version on YouTube, click here.Subscribers, to watch the subscriber version of the video, first log in then click on Dreamland Subscriber-Only Video Podcast link.