标签： SETI

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 ...

2020 May 2 Radio, The Big Ear, and the Wow! Signal Image Credit & Copyright: Rick Scott Explanation: Since the early days of radio and television we have been freely broadcasting signals into space. For some time now, we have been listening too. A large radio telescope at Ohio State University known as affectionately The Big Ear was one of the first lis...