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1. Michael Busch (michael_w_busch@mastodon.online)'s status on Thursday, 02-Mar-2023 15:53:47 UTC Michael Busch

   in reply to

   @Kencf618033 @mcnees The original "A Message From Earth" paper gives the list of pulsars on the plaque: https://astro.swarthmore.edu/astro61_spring2014/papers/sagan_science_1972.pdf .

   The spin periods and relative directions of the pulsars are intended to specify both the Sun's position and the time the plaque was made.

   However, some of the pulsar periods were not well known then and all of them have some random variation. So eventually the map will become useless.