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When a space object slams into the lunar surface, immense energy is released. Patterns found at young impact crater sites, like Chaplygin B, help us to understand the physics of these powerful events.

Moon Phase and Libration, 2021

Animation showing the geocentric phase, libration, position angle of the axis, and apparent diameter of the Moon throughout the year 2021, at hourly intervals.

What the Moon will look like from Earth, every hour of every day of 2021.

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