I was saddened to find out about the recent death, at the age of 92, of Frank Drake, one of the pioneers of SETI. One of the things he is most famous for is the equation bearing his name which estimates the number of intelligent civilizations in our galaxy, the Drake equation.
As a tribute to him I have reposted the blog post on this topic I wrote, back in 2014.
Revised Original post
The Earth is one of eight planets which orbit the Sun. The Sun is an ordinary star among the 100 billion or so stars in our Milky Way galaxy. The Milky Way itself is an average-size galaxy. To me one of the most fascinating questions is :
How likely is it that there are other intelligent civilizations within our galaxy ?
Editor’s Note: Read more, see link below for original item…