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Question 9 (1 point)

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Which of the following statements is untrue about comets?

Question 9 options:

a)

Comets lose mass when they come inside the orbit of Mars

b)

Long period Comets come from the Oort Cloud

c)

Comets are made of mostly water ice and dust

d)

Comets always have tails

Respuesta :

Answer:

Option d)

Explanation:

  • A few comets draw nearer to the Sun and accordingly lose mass all the more rapidly.  
  • Long-period comets (those which take over 200 years to orbit around the Sun) start from the Oort Cloud.  Danish space expert Jan Oort suggested that comets live in an immense cloud at the external scopes of the close planetary system, a long ways past the orbit of Pluto. This came to be called as the Oort Cloud.  
  • The major constituents of a comet are ice, dust and water.
  • Comets don't generally have tails. They build up a fluffy, shell-like cloud known as a coma, and one, two, or three tails when close to the Sun.