Jessica Sunshine Quotes on Astronomy & Cosmology (2 Quotes)

These results show that there is ice on the surface, but not very much and definitely not enough to account for the water we see in the out-gassed material that is in the coma the cloud of gas and dust that surrounds the comet.

We have known for a long time that water ice exists in comets, but this is the first evidence of water ice on comets.