Growth and Form of Planetary Seedlings: Results from a Microgravity Aggregation Experiment

Details Growth and Form of Planetary Seedlings: Results from a Microgravity Aggregation Experiment Growth and Form of Planetary Seedlings: Results from a Microgravity Aggregation Experiment

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvl..85.2426b&link_type=abstract

Physical Review Letters, Volume 85, Issue 12, September 18, 2000, pp.2426-2429

Physics

92

Scientific paper

The outcome of the first stage of planetary formation, which is characterized by ballistic agglomeration of preplanetary dust grains due to Brownian motion in the free molecular flow regime of the solar nebula, is still somewhat speculative. We performed a microgravity experiment flown onboard the space shuttle in which we simulated, for the first time, the onset of free preplanetary dust accumulation and revealed the structures and growth rates of the first dust agglomerates in the young solar system. We find that a thermally aggregating swarm of dust particles evolves very rapidly and forms unexpected open-structured agglomerates.

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