1.34 Describe how the orbit of a comet differs from that of a planet

Three differences between planets and comets are:

1. Comets are usually made from _________
2. Comets have highly elliptical _______  compared to planets
3. Comets usually travel _____ than ________
4. Comets usually have long _______ , made when the heat from the Sun which vaporises the comet

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