Which of the following questions is NOT part of what astronomers call the "cosmic haystack problem" in receiving messages from other civilizations in space?
A) we don't know what star might have planets with intelligent life
B) we don't know what channel they may be using to send messages
C) we don't know whether the signal is always on (continuous) or only for a brief time every cycle
D) we don't know how to receive signals in the wavelength range that is the most likely for interstellar communications
E) we don't know how other civilizations might encode messages in the carrier wave they send

Question

Quizplus · Accepted Answer

The question referring to wavelength range is not typically included in the "cosmic haystack problem," which specifically refers to the challenges of finding and detecting signals among a vast number of candidates. The other four questions are commonly included in this problem.

Which of the Following Questions Is NOT Part of What