Which telescope did astronomers use in 1974 to send an anticoded message to globular cluster M13?
A) HST
B) Keck
C) Arecibo
D) Chandra
E) Kepler

Name: Which telescope did astronomers use in 1974 to send an anticoded message to globular cluster M13? A) HST B) Keck C) Arecibo D) Chandra E) Kepler
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In 1974, astronomers used the Arecibo radio telescope to send an encoded message towards the globular cluster M13. This was an experimental attempt to communicate with potential extraterrestrial intelligence.

Which Telescope Did Astronomers Use in 1974 to Send an Anticoded