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How geysers erupt

Geysers are more than just pretty eruptions of water and steam– they’re complicated geologic events. But how do they work? We thought we knew, but turns out we had it all wrong.

South up Moon phase & libration 2013

This visualization shows the Moon’s phase and libration at hourly intervals throughout 2013, as viewed from the southern hemisphere. Each frame represents one hour. In addition, this visualization shows the Moon’s orbit position, sub-Earth and subsolar points, and distance from the Earth at true scale.