#SETI
3 posts
Radio Astronomy and SETI: Listening for Signals from Other Civilizations
Radio waves are the obvious first medium for interstellar communication — they travel at the speed of light and pass through dust. In 1960, Frank Drake began the first systematic search for extraterrestrial intelligence. Sixty-five years later, the search continues with enormously more powerful instruments.
What a Type II Civilization's Megastructures Would Look Like to Our Telescopes
A civilization capable of harnessing the full output of its star would leave signatures visible across light-years: dimming patterns, heat signatures, unusual spectral features. The science of megastructure detection is a real field of astronomy, and a handful of star systems have already attracted attention.
The Fermi Paradox and the Great Filter: Where Is Everyone?
The universe is 13.8 billion years old, contains hundreds of billions of galaxies, each with hundreds of billions of stars, and a significant fraction of those stars have Earth-like planets. Yet we see no signs of anyone else. The Fermi paradox is not a curiosity — it is one of the most important questions in science, and the leading answer is terrifying.