NASA’s TESS finds its first Earth-sized planet

NASA's TESS mission has identified TOI 700D, an Earth-sized planet in a star's habitable zone, potentially capable of supporting liquid water. TESS observes sky sectors for 27 days, tracking changes in stellar brightness to identify planets. The TOI 700 system includes three planets: TOI 700B, TOI 700C, and TOI 700D, with TOI 700D being the only one in the habitable zone. NASA's Goddard Space Flight Center has created models to explore TOI 700D's potential conditions, suggesting it could be either water-covered or completely dry.

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