The Deep Impact mission to Comet Tempel 1 measured the density of the comet's nucleus. This was found to be:
A)about the density of iron.
B)about the density of ordinary rock.
C)less than the density of water.
D)so small as to suggest that the nucleus is hollow.

Question

Quizplus · Accepted Answer

The Deep Impact mission found that the density of Comet Tempel 1's nucleus is less than the density of water, indicating it is not solid rock or iron but rather a "dirty snowball" composed of ice mixed with dust and rocky materials.

The Deep Impact Mission to Comet Tempel 1 Measured the Density