RT @NASAKepler: Here’s a wonderful diagram that shows humankind’s known habitable zone planets. #Kepler186f nasa.gov/ames/kepler/di… http://t.co/DAG7viYj20
RT @NASAKepler: Here’s a wonderful diagram that shows humankind’s known habitable zone planets. #Kepler186f nasa.gov/ames/kepler/di… http://t.co/DAG7viYj20