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NASA's TESS Planet hunter finds Its 1st Earth-size world in 'Habitable Zone'

15:30, Wednesday, 08 January, 2020
NASA's TESS Planet hunter finds Its 1st Earth-size world in 'Habitable Zone'

For the first time, the agency's Transiting Exoplanet Survey Satellite (TESS) has discovered a roughly Earth-size planet in the habitable zone of its host star, the zone of orbital distances where liquid water could be stable on a world's surface, researchers announced today (Jan. 6).

The newfound exoplanet, known as TOI 700 d, lies just 101.5 light-years from Earth, making it a good candidate for follow-up observations by other instruments, scientists added."TESS was designed and launched specifically to find Earth-sized planets orbiting nearby stars," Paul Hertz, astrophysics division director at NASA Headquarters in Washington, said in a statement. "Planets around nearby stars are easiest to follow up with larger telescopes in space and on Earth. Discovering TOI 700 d is a key science finding for TESS."

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