The Crowded Universe: The Search for Living Planets - Alan Boss - Google Books

https://books.google.de/books?id=nx3E2YV3nnIC&pg=PA7#v=onepage

We are nearing a turning point in our quest for life in the universe—we now have the capacity to detect Earth-like planets around other stars. But will we find any? In The Crowded Universe, renowned astronomer Alan Boss argues that based on what we already…