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4 hours ago · Living on one of the seven Earth-size planets in the TRAPPIST-1 system would be strange indeed. Looming ominously in the sky is an enormous red star, prone to fiery outbursts and appearing several times bigger than the Sun. Hours of the day don’t exist; each planet is tidally locked to the star so that one side is forever scorchingly hot, the other eternally frozen.
20 hours ago · Where is a planet when it is moving most rapidly in its orbit? A) at aphelion B) at the focus of its orbit C) at perihelion D) near Uranus! F) approaching the closest distance to the Sun
