By induction rather than direct observation. This page contains the measurements...

		jMyles on July 23, 2015 \| parent \| context \| favorite \| on: NASA announces discovery of Earth-like planet with... By induction rather than direct observation. This page contains the measurements of the planet which might be the subject of the announcement; it gives you an idea of what kinds of metrics drive such an analysis: http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOver...