See Mercury, Venus and Jupiter in Tightest Night Sky Cluster until 2026 | Observations, Scientific American Blog Network:
"Cicadas aren’t the only scientific rarity expected this month. At the end of May three planets will be visible to the naked eye in one small area of the sky. The planets Mercury, Venus and Jupiter will form “the tightest gathering of three naked-eye planets that the world will see until 2026,” according to the venerable Sky & Telescope magazine."
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