Based on "Kepler" (NASA) space mission, An international team of Space scientists will try to map - How many planets similar so earth found so far outside our solar system?

NASA Confirms "1,300 New Worlds Discovered By Kepler Probe – 9 Are Probably HABITABLE" (During k2)

Searching the future for Earth-like Planets orbiting in the habitable (Goldilocks) zones of Sun-like stars in the milky way galaxy. Planets like Earth that can support the "building blocks of life": DNA, Energy source, Liquid Source, atmosphere etc.. Space Scientists are using, "Spectra" - to separate light into colors in order to reveal what the planet is made of: atmospheres, gas, climates and potential habitable for life.