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Thumbs Up From Out of This World

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ASA spacewalkers (from left) Bob Behnken and Chris Cassidy give a thumbs up during a spacewalk to install hardware and upgrade International Space Station systems.

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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