Earth-like exoplanets common?

Commenting on a story in the local paper about the discovery of a rocky exoplanet with four times the mass of Earth, Paul Gilster suggests that while this particular discovery awaits confirmation - its existence, not to mention its "habitability," or its potential to support life as we know it, is far from clear - the really big idea in the locally-reported news article is that rocky earth-like planets could outnumber Jupiter-type worlds three-to-one.

With the catalog of exoplanets growing steadily and new observational techniques now coming online, this story, as it were, is developing.


Wikipedia: Exoplanets, Hot Jupiters