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Question

Why is the Halley's comet known as a periodic comet? [3 marks]

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Solution

Halley’s comet is a periodic comet because it appears after a regular interval of time. (1 mark)
A comet is visible only when it approches the sun because the sun’s rays make the gas glow. (1 mark)
Halley’s comet has a period of 76 years i.e., it is seen after every 76 years. (1 mark)

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