What Is the Chief Difficulty in Attempting to Detect Planets

question 57

Multiple Choice

What is the chief difficulty in attempting to detect planets around other stars?

• A)Even the largest planets are typically at least a factor of 10 times smaller than their host stars.
• B)Planets do not emit visible light. They are typically at least a billion times fainter than their host stars.
• C)Planets do not glow in the infrared, so infrared telescopes cannot be used to study them, either.
• D)A and B
• E)A, B, and C

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