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168 Seconds of Broadcast, 25,000 Years of Travel: in 1974, an Antenna From Puerto Rico Targeted the Cluster of Stars that Passed over It at 1 p.m.

Summary by SciencePost
It is often assumed that sending a signal to the stars amounts to aiming at a fixed target, as a letter would be sent to a known address. This is not true. In 1974, the observatory of Arecibo pointed to the M13 clusters knowing that the latter would have moved long before the arrival of the message, expected in about 25,000 years. To remember [...]
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It is often assumed that sending a signal to the stars amounts to aiming at a fixed target, as a letter would be sent to a known address. This is not true. In 1974, the observatory of Arecibo pointed to the M13 clusters knowing that the latter would have moved long before the arrival of the message, expected in about 25,000 years. To remember [...]

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SciencePost broke the news on Wednesday, November 4, 2026.
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