A "Blue Moon," defined as the second full moon within a single calendar month, will be visible this weekend. While officially full in the early hours of Sunday, May 31, the most dramatic viewing will be on Saturday, May 30, during moonrise just after sunset. The moon will appear larger and tinted orange due to atmospheric scattering of light, a phenomenon similar to that which causes colorful sunsets. AI
RANK_REASON The cluster describes a recurring astronomical event, the second full moon in a calendar month, which is a matter of public interest and observation. [lever_c_demoted from research: ic=2 ai=0.0]
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