Zeta Herculis (Tianji): The Brightest Light in the Keystone
Tianji, Zeta Herculis (ζ Her), is a spectroscopic binary star located 35 light-years away in the constellation Hercules. With an apparent magnitude of 2.81, it… Read More »Zeta Herculis (Tianji): The Brightest Light in the Keystone