The Keystone of Hercules marks the Strongman’s torso and is made up of the stars Zeta (ζ), Eta (η), Pi (π), and Epsilon (ε) Herculis. // Astronomy: Roen Kelly
Each week, Astronomy magazine Senior Editor Michael E. Bakich, a master at explaining how to observe, posts a podcast about three or more objects or events you can see in the sky.
Targets for June 20–27, 2013
Naked-eye: Keystone of Hercules
Small telescope: Globular cluster M10
Large telescope: Reflection nebula NGC 6726
