A Friend of Yours Who Has Not Taken an Astronomy

question 7

Multiple Choice

A friend of yours who has not taken an astronomy class looks at your textbook and really likes the picture of the Pleiades, a cluster of stars surrounded by a bluish reflection nebula. She wants to know what causes that beautiful blue glow. To explain it to her, you want to compare the process that causes the blue glow to something that is in your friend's everyday experience. Which of the following terrestrial phenomena is the result of the same type of process that makes a reflection nebula in space?

• A) the blueish glow of the flame on a gas stove
• B) the blue light you see reflected from a blue sweater
• C) the blue color of the Earth's sky
• D) the blue-white color of the hottest stars
• E) the blue feeling you get when you don't do well on an astronomy exam

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