is a Comet ?
How big is a comet nucleus ?
Where do comets come from ?
How do comets become visible from time to
What is the shape of the path of a comet ?
What happens when a comet nucleus races towards the sun?
How can we distinguish a dust tail from a gas tail?
How many comets are seen every year ?
What is the life time of a comet ?
What is the difference between a comet and a shooting star ?
What is the difference between comets and
Why are spacecrafts sent to study comets ?
Can comets collide with the earth ?
What will happen if a comet strikes the earth
Why do scientists study comets ?
How are comets named ?
Who are the amateur astronomers who have
discovered many comets ?
Why were comets feared in the past ?
Are there any ancient references to comets in
Who was the first person to measure distances
to comets ?
When did it become possible to predict the
appearance of comets ?
Why is Comet Hale - Bopp so special ?
Can comets be photographed without a
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