NASA ScienceCasts: A Sunset Sky Show

Click here to see more videos: https://alugha.com/NASA Visit http://science.nasa.gov/ for more. On the evening of March 18 (2018), step outside for a view of the crescent Moon, Venus, and Mercury together above the twilight horizon.

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NASA ScienceCasts: Earth's Magnetosphere

Enveloping our planet and protecting us from the fury of the Sun is the magnetosphere, a key to helping Earth develop into a habitable planet. Click here to see more videos: https://alugha.com/NASA Visit http://science.nasa.gov/ for more.