Comets as Building Blocks

Details Comets as Building Blocks Comets as Building Blocks

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ara%26a..49..281a&link_type=abstract

Annual Review of Astronomy and Astrophysics, vol. 49, issue 1, pp. 281-299

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

Recent results, many but not all from flybys of comets by spacecraft, particularly the results from Deep Impact, have dramatically improved our understanding of the physical properties of cometary nuclei. Characteristic features are modest size (R<20 km), high porosity, low strength, and heterogeneity. There is also evidence that can be interpreted as showing the original cometesimals in a cometary nucleus and suggesting radial migration of macroscopic cometesimals during the aggregation of nuclei, which in turn aggregated into the cores of the giant planets.

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