How many Earths?(exoplanets.newscientistapps.com)2 points·by zeratul·13 anni fa·0 commentsexoplanets.newscientistapps.comHow many Earths?http://exoplanets.newscientistapps.com/?cmpid=NLC|NSNS|2013-2609-GLOBAL&utm_medium=NLC0 commentsPost comment—