Re: 1 in 5 stars have earth-like planets around them!
"Earth-like" is the term journalists and scientists with a sensationalist flair use for Earth mass planets. And the so-called "habitable zone" is pure conjecture.
Once upon a time there were canals on Mars and rain forests on Venus.
Exoplanetary astronomy is exciting, but we hear about "Earth-like" planets almost as often as we hear about Voyager leaving the Solar system and entering interstellar space.
"No, I better not look. I just might be in there."
—Foghorn Leghorn, Little Boy Boo