Arecibo

  • The Search for Extraterrestrial Intelligence (SETI)

    Young Astronomers Blog, Volume 29, Number 1. The universe is a big place. There might be some 200 billion to over a trillion galaxies in the visible universe, each with around 200 billion stars. Then here we are on this bluish/green planet orbiting a single yellowish star in a solar system around ½ way out…