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Messier 13: Difference between revisions
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[[Messier 13]] (M13), also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of about 300,000 stars in the constellation of [[Hercules]].<ref>[http://en.wikipedia.org/wiki/Messier_13 Messier 13]</ref> | |||
==Arecibo message== | |||
The Arecibo message of 1974, which contained encoded information about the human race, DNA, atomic numbers, Earth's position and other information, was beamed from the Arecibo Observatory radio telescope towards M13 as an experiment in contacting potential extraterrestrial civilizations in the cluster. However, the experimenters intentionally sabotaged their goal: the message will reach the cluster's past position in 25,000 years. By then, the cluster will occupy a different position in space; it will never receive the message.<ref>[http://en.wikipedia.org/wiki/Messier_13 Messier 13]</ref> | |||