Comet, Like Sean Penn’s Head, Mostly Air
Researchers analysing the data have found the comet is mostly made up of loose powder-like particles.The findings suggest “dirty dustball” is a better name for Tempel I than “snowy dirtball” - a past nickname.
The material is unbelievably fragile Michael A’Hearn, University of Maryland “The comet is mostly empty, mostly porous,” said Michael A’Hearn, a comet specialist from the University of Maryland. “Probably all the way in, there is no bulk of ice. The ice is all in the form of tiny grains.
