When the First Pulsar Was Discovered, Scientists Thought It Might

question 11

Multiple Choice

When the first pulsar was discovered, scientists thought it might be a signal from a distant extraterrestrial civilization. However, this idea was quickly discarded because:

• A) it was realized the signals were interference from cars and trucks passing by the radio observatory
• B) the government made the scientists hide their original finding
• C) they realized that Cepheid variables could produce the detected radio signals
• D) more pulsars were discovered, which meant that these were natural phenomena
• E) the technology required to create pulsed signals is beyond the power of any civilization

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