来自地球的信息

2020 May 3 A Message from Earth Image Credit: Frank Drake (UCSC) et al., Arecibo Observatory (Cornell U.); License: Arne Nordmann (Wikimedia) Explanation: What are these Earthlings trying to tell us? The featured message was broadcast from Earth towards the globular star cluster M13 in 1974. During the dedication of the Arecibo Observatory – still one ...