As the number of exoplanets being discovered grows into the thousands, astronomers are starting to find ones which could be potentially habitable for some kind of life. These are generally smaller, rocky planets like Earth; such small worlds are the most difficult to find, but thanks to space telescopes like Kepler and other observatories on Earth, they are now within reach of discovery.
Until now, the number of confirmed exoplanets which are potentially habitable has been five, (while another 27 candidates are still waiting confirmation). But now a new planet has been added to the confirmed list.
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