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Astronomers discovered ultra-hot, Earth-sized exoplanet with a lava hemisphere
Enlarge / Like Kepler-10 b, illustrated above, newly found exoplanet HD 63433 d is a small, rocky planet in a decent orbit of its star. (credit score: NASA/Ames/JPL-Caltech/T. Pyle) Astronomers have found an uncommon Earth-sized exoplanet they consider has a