pale blue dot
It astonishes me how much we seem to know about aliens. They build technology-driven civilisations and pilot spaceships across the galaxy. They create energy-harvesting structures around their stars. They beam interstellar greetings to us. We cannot be sure that, when our own broadcasts reach them in some future era, they will breathlessly await the arrival …
Continue reading “Why our imagination for alien life is so impoverished”
Freeman Dyson, the English-born American theoretical physicist, and mathematician who imagined a hypothetical alien megastructure called “Dyson Sphere” died on February 28, 2020. Freeman was 96 years old.
In 1964, Russian astrophysicist Nikolai Kardashev (born April 25, 1932) defined three levels of civilizations, based on the order of magnitude of power available to them (known as the Kardashev scale):
Currently, we’re slowly transitioning to renewables and fusion energy may become available in the future. If we don’t destroy ourselves or the environment, as humanity progresses further, we will likely gain complete control of the Earth’s resources. At that stage, we’ll probably begin to look outwards for new places to expand into. But, if we …
Continue reading “What is a Dyson Sphere and How to Build One?”
