Many hypotheses have been suggested to explain how asteroidal or cometary material got into the inner solar system, but no consensus yet exists.

The difference suggests that cometary material is unlikely to be the major contributor to Titan's atmosphere.

A coronal mass ejection carried the cometary material to Ulysses.

Interactions between energetic solar wind particles and cometary material evaporating from the nucleus is likely to contribute significantly to this effect.

Such information is considered important, for example, in learning where in space the cometary material was made.

It discovered He+ plasma produced by charge exchange of solar wind He++ with neutral cometary material.

But there is no certainty that the cometary material is, indeed, what the sensors say it is.

Both the change in velocity and the energy loss depend on the complex permittivity of the cometary materials.

A rain of cosmic and cometary material is widely thought to have brought early Earth not only water but the carbon-rich molecules necessary for life.

The combination of this fine asteroid dust, as well as ejected cometary material, produces the zodiacal light.