Satellites and other spacecraft proposed to carry messages, images or objects for people in the far future rather than to run a scientific or service instrument, such as KEO, a proposed capsule that was to carry messages from the citizens of present Earth to humanity very far ahead, when it would re-enter the atmosphere. A project belongs here when its cited source calls it a space time capsule. Satellites that observe Earth, measure the planet or study the Universe have groups of their own in this subcategory.
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Proposed Space Time Capsules
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Wikipedia: KEO
Has Member: KEO, Lead sectionQuote, Has Member: KEO, Lead section
a proposed space time capsule which was supposed to have been launched in 2003
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