In 1974, a Radio Message Was Sent Out from the Arecibo

question 59

Multiple Choice

In 1974, a radio message was sent out from the Arecibo observatory in Puerto Rico towards a globular cluster, 21,000 light-years away. Approximately how far has this message gotten as of today?

• A) It's just beyond the Neptune in our solar system
• B) It's just passing through the Oort cloud surrounding our solar system
• C) It's just passing stars that are close neighbors to the Sun in the Milky Way
• D) It's almost at the center of the Milky Way
• E) It's already arrived at the globular cluster

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