Physics
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986sspe.nasas....s&link_type=abstract
In NASA. Lyndon B. Johnson Space Center Space Station Planetology Experiments (SSPEX) 2 p (SEE N86-27136 17-88)
Physics
Clouds, Cratering, Debris, Evolution (Development), Experiment Design, Gravitational Effects, Protoplanets, Space Stations, Mass Distribution, Morphology, Photography, Projectiles, Reduced Gravity, Size Distribution, Space Commercialization, Targets
Scientific paper
The growth of planetesimals in the Solar system reflects the success of collisional aggregation over disruption. Recent experiments performed at the NASA-Ames Vertical Gun Range are discussed using the production of debris cloud impaction to model protoplanetary accretion. The impact experiment assessed the differences between clustered and single body impacts on particulate surfaces. The preliminary results would indicate that collisions between two debris clouds might produce aggregates, thereby increasing particle sizes, whereas a single particle impacting a particle results in disruption and comminution. Such an experiment could provide new insight for early planetary growth processes and for interpreting the record of this stage. The use of the microgravity environment of the Space Station to further the research is discussed.
Gault Donald E.
Schultz Peter H.
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