NPR News: It's big! It's bright! It's a rare blue supermoon! Here's how to check it out

It's big! It's bright! It's a rare blue supermoon! Here's how to check it out
The Earth's lunar sidekick will appear extra big and bright as it reaches its fullest stage on Wednesday. It's not just the biggest supermoon this year, it's also a rare blue supermoon.

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