[meteorite-list] Extra solar impactors and comets
From: Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Sun Jun 4 21:07:25 2006 Message-ID: <006301c68839$064d23f0$6402a8c0_at_Dell> much appreciated Kevin! ----- Original Message ----- From: "Kevin Forbes" <vk3ukf_at_hotmail.com> To: <meteorite-list_at_meteoritecentral.com> Sent: Saturday, June 03, 2006 10:05 PM Subject: [meteorite-list] Extra solar impactors and comets > > > Greetings all, > > a thought to pervade your mind and something else to contemplate apart > from your navel. > > The oort cloud, the very outer extremeties of our solar system, millions > of bodies, probably mainly ices mixed with silicates. Cometary bodies and > planetary orbs lost to the depths of space. But, they are there. Other > star systems probably have a similar 'oort' thing around them, slowy > following the gravitational attraction of the central star in that system > as it drifts through the galaxy. Over time, a passing of stars occurs, not > an entirely close call, but one that would allow material and bodies of > one system to migrate or be stolen by the other system. A dramatic change > in course for the migrating body, some may just change from their origanl > formation parent to their new foster star and stay in the darkness, some > may have a different set of motions inflicted upon them, sending them on a > course that sweeps through the inner system of rocky planets. Look out. > > How many orphans are there in space, not gravitationally attached to any > star, having either been ejected through orbital conflicts in a system > with a larger more massive body, or formed ( I shall call this, 'A Dark > System' ) a dark system, a coagulation of material from a cloud of dust > and icy particles that certainly forms lumps, but comes nowhere near that > of forming a solar system. How many 'Dark Systems' are there, and how > often do they collide with star systems and loose material or meld with. > > And now, I must make a comment regards a statement by a scientist that > made, in my opinion, an awakening utterance. At first I thought, > 'outrageous', 'how silly'. Silicate dusts were found in cometary debris, > he therefore postulated that comets must have formed near the sun. > ???????????? > > In my mind, I see bodies of the inner solar system being the source of the > silicate dusts, their constant impacts creating a constant supply of fine > dusts that would be blown by solar wind to the extremeties of the outer > solar system, where they would fall upon any icy cometary bodies that they > happened to chance upon. It must be obvious to that icy bodies such as > comets would NOT form near the sun, due to the temperature being high. Any > comets hanging around near the inner solar system, Jupiter and inwards > would quickly evaporate. Comets must be born in the cold outer reaches of > our or other systems. Some comets in our system at this moment may have > been stolen from passing systems as the two interacted for a period during > their passing of each other. The fact that there are silicate dusts mixed > up in the ices, would suggest that they have been collecting 'fairy dust' > for a period of time. What could have happened??? Perhaps before the sun > burst into life, in the pre-solar nebula, the bulk of the comets did in > fact reside in the inner solar system. When the larger bodies began to > accumulate they were ejected en-masse to the outer reaches where they are > now existing as a record of what happened, waiting for us to go there, and > study. Can isotopic ratios give us a clue as to there original place of > formation in the solar nebula? > > Is our understanding of such things as isotopic data and distribution > satisfactory to enable this? > > I have been absent from the list for a while, I may have missed something > that I should not have. > > If you are thinking that I need a thick ear, then please, bash away. > > Yours faithfully, Kevin Forbes, VK3UKF. > > > ______________________________________________ > Meteorite-list mailing list > Meteorite-list_at_meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list Received on Sun 04 Jun 2006 08:43:12 PM PDT |
StumbleUpon del.icio.us Yahoo MyWeb |