Rare supermoon coincides with the first day of spring
It will be the first spring equinox supermoon in 19 years, and won't happen again until 2030.
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March 20 Worm Moon: How to see last supermoon of 2019 on spring equinox
The third and final supermoon of 2019 will premier in the night sky March 20th -- only four hours after the spring equin...
