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Upgrading the Space Station Is All in a Day's Work

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NASA astronaut Robert Behnken works during the Wednesday, July 1, 2020, six-hour and one-minute spacewalk to swap an aging nickel-hydrogen battery for a new lithium-ion battery on the International Space Station’s Starboard-6 truss structure.

Source : NASA

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Hypergiant Star Canis Majoris

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This artist’s impression of hypergiant star VY Canis Majoris shows the star’s vast convection cells and violent ejections.

Source : NASA

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