As a Comet Enters the Inner Solar System, Its Coma

question 21

Multiple Choice

As a comet enters the inner Solar System, its coma can grow to a large size, as large as some planets in a few cases.What causes this growth?

• A) Tidal forces from the inner planets pull material off the comet.
• B) The comet moves at a higher velocity near perihelion and loose material is dislodged.
• C) The comet's tectonic action is triggered by the Sun's strong gravity.
• D) The rotation (spin) of the comet increases near perihelion due to angular momentum conservation.
• E) The Sun's radiation heats the comet, allowing materials to sublimate into a cloud.

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