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Find the Keystone in Hercules, and the Hercules Cluster M13

Summary by EarthSky
Hercules is a faint constellation. But its mid-section contains the easy-to-see Keystone asterism, that is, a star pattern. You can find Hercules between the bright stars Vega in Lyra the Harp, and Arcturus in Boötes the Herdsman. And once you find the Keystone, you can easily locate M13, the Hercules cluster. Chart via EarthSky. Looking up has never felt more important. Please donate to help EarthSky keep bringing the sky to your screen. Use Ve…

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EarthSky broke the news in United States on Sunday, May 18, 2025.
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