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Mercury: A Planet Exposed

In Mercury: A Planet Exposed, narrator Professor Brian Cox highlights the brutal environment of the smallest planet in our Solar System. Its small size meant Mercury didn’t have enough gravity to hang on to its atmosphere. Without the protection of even that thin line of gas, temperatures fluctuate from 842°F (450°C) during the day to -290°F (-180C) degrees at night on the rocky planet. This video is excerpted from BBC’s The Planets, a series that explores the dramatic lives of the eight planets in our Solar System.
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The Planets
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2:32
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