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ardeegee · 10-07-2010, 08:05 AM

Kenny, you should do some research into 26Al/Aluminum-26. You'll see that this (extinct) isotope was what drove the melting of the early small solar system bodies-- and in that order-- first they formed, THEN they melted when they were large enough to hold enough heat in. The first stages of asteroid/comet/planitestimal formation don't actually produce that much heat, as it is an accretion of particles traveling in mostly the same orbit and at mostly the same speed-- if object A is traveling at 50,000 miles per hour and object B is traveling in the same direction at 50,001 miles per hour, when they collide-- not much happens. It isn't the vee that matters, it is the delta vee.

http://www.google.com/search?hl=en&s...AAAKoEBU_QIpth

http://www.google.com/search?hl=en&s...=&oq=&gs_rfai=

http://www.google.com/search?hl=en&s...AAAKoEBU_Q4Rkb

10-07-2010, 08:05 AM	#59
ardeegee Maratus speciosus butt Posts: 3,292 Karma: 1162698 Join Date: Sep 2009 Device: PRS-350	Kenny, you should do some research into 26Al/Aluminum-26. You'll see that this (extinct) isotope was what drove the melting of the early small solar system bodies-- and in that order-- first they formed, THEN they melted when they were large enough to hold enough heat in. The first stages of asteroid/comet/planitestimal formation don't actually produce that much heat, as it is an accretion of particles traveling in mostly the same orbit and at mostly the same speed-- if object A is traveling at 50,000 miles per hour and object B is traveling in the same direction at 50,001 miles per hour, when they collide-- not much happens. It isn't the vee that matters, it is the delta vee. http://www.google.com/search?hl=en&s...AAAKoEBU_QIpth http://www.google.com/search?hl=en&s...=&oq=&gs_rfai= http://www.google.com/search?hl=en&s...AAAKoEBU_Q4Rkb