E.P. Grondine writes: > I suppose that ultimately this may all go back to > whether or not Jupiter occupied its current orbit > before the LPBE (Late Period Bombarment Event) - my > guess is that it did not.
As far as I can say, the location of Jupiter's orbit during the Late Heavy Bombardment (if it has changed at all) has no influence on the meteorid streams we see today. Meteorid streams "live" for a few Ma beore they are disrupted by perturbations from the planets, whilst the Late Heavy Bombardment ended ~3.8 Ga ago. If a Pribram/Neuschwanstein Meteoroid Stream really exists, then it probably traces back to a much younger event. There are some great simulations of colliding rubble pile asteroids at this web site: http://www.astro.umd.edu/~dcr/Research/rubble.html When looking at these animations, just think of one rubble pile asteroid made of H-type material, and of the other made of E-chondrites: At the end, you get a new rubble pile, where H- and E-type material is mixed, plus a number of H- and E-type fragments that escape. These fragemnts will probaly share similar orbits - in other words, the form an meteorid stream that includes both H and E-type material. Enjoy the animations... ;^) Greetings, Herbert ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
