tag:blogger.com,1999:blog-5074683.post7937139842059487230..comments2024-03-23T07:33:30.972+00:00Comments on Quodlibeta: By JoveJameshttp://www.blogger.com/profile/01594220073836613367noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-5074683.post-4033344235610558692009-07-31T13:30:53.566+01:002009-07-31T13:30:53.566+01:00Some more support for the Jupitar and Saturn as Gu...Some more support for the Jupitar and Saturn as Guardian planets theory.<br /><br />http://blogs.discovermagazine.com/80beats/2009/07/30/comets-not-so-likely-to-smash-into-earth-and-kill-us-all/Humphreyhttps://www.blogger.com/profile/11936974517695558399noreply@blogger.comtag:blogger.com,1999:blog-5074683.post-80842821754766454422009-07-28T09:49:21.851+01:002009-07-28T09:49:21.851+01:00Of course, being hit by comets is not automaticall...Of course, being hit by comets is not automatically a bad thing. See here for instance:<br /><br />http://www.newscientist.com/article/dn17520-comets-not-asteroids-to-blame-for-moons-scarred-face.html<br /><br />It helps not to be in the way of course.Humphreyhttps://www.blogger.com/profile/11936974517695558399noreply@blogger.comtag:blogger.com,1999:blog-5074683.post-85455885103028646632009-07-27T18:24:12.249+01:002009-07-27T18:24:12.249+01:00It's a bit of a double edged sword according t...It's a bit of a double edged sword according to this study. <br /><br />http://news.bbc.co.uk/1/hi/sci/tech/6962508.stm<br /><br />On the one hand Jupiter appears to provide protection from external comets and other objects. On the other hand it's gravitational field stirs up the asteroid belt and redirects some objects towards the earth (although most of them are very small). Luckily the solar system is so diffuse that serious impacts are extremely rare (although the Tunguska Event may have been as high as 10-15 megatonnes). The last really significant one was 65 million years ago.Humphreyhttps://www.blogger.com/profile/11936974517695558399noreply@blogger.com