Reply To: Universe – Sun and the moon


Tobi wrote: “An estimate published in the Astrophysical Journal concludes that there may currently be dozens of radio-capable civilizations in the Milky Way, with 36 being the most likely number.”

  • I am not sure how they can calculate the number of civilizations, let alone those “capable of using radio.” Can you provide the reference? Of course, it is not a critical issue, but I am just curious.
  • Astrology primarily uses spectroscopy (light emitted by stars) to come to conclusions about stars and planets. Of course, planets do not emit light, so they need to use indirect methods to find planets, and that is why it was only in 1992 that scientists found the first planet outside the solar system.
  • The closest star with planets is more than four light-years away. A light-year is a distance traveled by light in a year. That is an astounding distance! I don’t think humans will be able to travel to even the closest planetary system (outside our solar system) within the next 100 years or may be ever. See “Could humanity send astronauts to Alpha Centauri

P.S. Tobi emailed me the following paper: “The Astrobiological Copernican Weak and Strong Limits for Intelligent Life.” Thanks, Tobi.

  • Of course, it is an indirect estimate. To quote the paper: “Most famously, Drake (1965) developed an equation which in principle can be used to calculate how many Communicating Extra-Terrestrial Intelligent (CETI: pronounced “chetee”)
    civilizations there may be in the Galaxy..”
  • The Drake equation seems to provide a vastly underestimated number. According to the Buddha, life exists on most planetary systems, each with 31 realms like ours. Think about the following: As I mentioned above, science did not find evidence for a single planet outside our solar system until 1992. With time, more evidence in support of the Buddha Dhamma will come from science.