Asteroid approach, Science operations begin! |
Asteroid approach, Science operations begin! |
Aug 24 2018, 06:48 PM
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Member Group: Members Posts: 540 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
NASA update on the OSIRIS-REx mission, includes first picture of the asteroid from the spacecraft.
Begins Operations |
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Apr 17 2019, 08:44 PM
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
The popular model these days is that in the protoplanetary disk dust grews into pebbles, probably mm sized in the inner solar system. In some parts of the disk these be came concentrated enough by one of a variety of of mechanisms to undergo a gravitational instability which caused clumps of them to collapse into asteroids ~100km in diameter. The consolidated rocks would form in these asteroids and be broken up and scattered in later collisions.
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