The image in the figure below is of Comet Borrelly. 1. What do you see in the im

Question

The image in the figure below is of Comet Borrelly.

1. What do you see in the image that tells you that comets produce their own comas and tails?

a. The light color of the image suggests that the comet's nucleus is icy.

b. The haze is material sublimating from the nucleus.    

c. The section on the lower right is about to break up.

d. none of the above

2. In what direction is the sun most likely to be in the above figure?

a. in the direction of the bottom-left corner

b. in the direction of the upper-right corner   

c. it is not possible to tell from the picture

d. below the nucleus

Explanation / Answer

1.

Answer: a. the light color of the image suggests that the comet’s nucleus is icy.

Explanation: The central part of a comet is also called a dirty snowball or an icy dirtball. The nucleus of comet is composed of rock, dust, and ice. The brightness of the comet depends on the composition of the nucleus.

2.

Answer: a. in the direction of the bottom-left corner

Explanation: In the figure, comet was moving towards the Sun. The Sun in the figure existed at the bottom-left corner. The comet approaching towards the Sun becomes brighter than the Sun.

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