The most Earth-like planet ever discovered is orbiting a Sun-like star 600 light years away, every 290 days.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/habitable-%E2%80%98super-earth%E2%80%99-found
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/astronomy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research-agencies
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer