This is a pretty big milestone.  The first Earth sized planet in a star's habitable zone.  Pity it's so far away (500 light years) that spectral analysis probably won't be possible to figure out what its atmosphere has in it. The first Earth-sized exoplanet orbiting within the habitable zone of another star has been confirmed … Continue reading First potentially habitable Earth-sized planet confirmed by Gemini and Keck observatories — ScienceDaily →