A second Earth-sized world is found in habitable zone of a star with three previously known planets.
NASA spots 2nd Earth-size world
Meet TOI-700's exoplanets: Our best bet for alien life - Big Think
Habitable Planet Reality Check: TOI-700e Discovered by NASA's TESS Mission
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Second Earth-sized World Found in System's Habitable Zone
Second terrestrial planet found around Proxima Centauri
Earth-size exoplanet spotted just 72 light-years away
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Habitable zone - Wikipedia
Astronomers Find Water on an Exoplanet Twice the Size of Earth
There Is Only One Other Planet In Our Galaxy That Could Be Earth
NASA Discovers an Earth-Like Habitable Planet 100 Light Years Away
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NASA Discovers Super-Earth, A Potentially Habitable Planet
NASA announces the discovery of an Earth-like planet in a
