2000
DOI: 10.1103/physrevlett.85.2426
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Growth and Form of Planetary Seedlings: Results from a Microgravity Aggregation Experiment

Abstract: 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… Show more

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Cited by 250 publications
(127 citation statements)
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“…We show in this letter that a simple analysis of N-dimensional (N-D) gravity leads to compactification lengths in close agreement with the more sophisticated calculations of general relativity and string theory [4]. Following this cue, we then present calculations that suggest that the effects of N-D forces, although very small, might for particular values of N fall within the detection range of dedicated neutron experiments.…”
supporting
confidence: 62%
“…We show in this letter that a simple analysis of N-dimensional (N-D) gravity leads to compactification lengths in close agreement with the more sophisticated calculations of general relativity and string theory [4]. Following this cue, we then present calculations that suggest that the effects of N-D forces, although very small, might for particular values of N fall within the detection range of dedicated neutron experiments.…”
supporting
confidence: 62%
“…Many interstellar formations comprise nano-or microscale dust particles that begin as disordered monomeric subunits, which electrostatically aggregate to form fractal (lacey) agglomerates that serve as foundries for comets and planetary seedlings (10)(11)(12)(13)(14)(15)(16). Soot, ubiquitous in the Earth's troposphere, is also comprised of nanometer sized carbonaceous monomers aggregated in a disordered lacey structure.…”
mentioning
confidence: 99%
“…In these models, individual dust particles collide to create aggregate structures which are fractal or fluffy in nature Blum et al (2000); Dominik et al (2007a). The resulting structure or morphology of these aggregates are then analyzed using statistically significant populations (many thousands of particles) to determine how various properties of the resulting particles differ.…”
Section: Introductionmentioning
confidence: 99%