Approximately how soon might we expect an immediate response from a civilization that received the signal we sent to the globular cluster m13 (25,000 light-years away) in 1974? - Qammunity

Approximately how soon might we expect an immediate response from a civilization that received the signal we sent to the globular cluster m13 (25,000 light-years away) in 1974?

asked Oct 13, 2023 164k views

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