Honeycombed Asteroids

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Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999psrd.repte..30t&link_type=abstract

Planetary Science Research Discoveries

Astronomy and Astrophysics

Astronomy

Asteroids, Density

Scientific paper

Asteroids seem to have lower densities than the rocks scientists believe compose them. This implies that there is quite a bit of empty space inside the typical asteroid or small moon. Lionel Wilson (Lancaster University, UK), Klaus Keil (University of Hawaii), and Stanley Love (astronaut candidate, Johnson Space Center) investigated two possibilities for producing the high percentage of pore space. In one case they calculated that if an asteroid were broken apart and then reassembled, the resulting rubble pile would have a porosity of 20 to 40%, hence a density 20 to 40% lower than it had to begin with. They also calculated how fractures would form on bodies that contained water ice that was heated to steam, concluding that the fractures would be pervasive and, hence, decrease the density of the object.

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