Our galaxy is filled with potentially habitable planets -- at least 300 million of them, according to NASA.
원문출처 : https://www.cnn.com/2020/11/05/world/nasa-300-million-habitable-planets-intl-hnk-scli-scn/index.html
원문출처 : https://www.cnn.com/2020/11/05/world/nasa-300-million-habitable-planets-intl-hnk-scli-scn/index.html