Zeta Ophiuchi
Zeta Ophiuchi (ζ Oph) is a hot blue subgiant star located 366 light-years away in the constellation Ophiuchus. With an apparent magnitude of 2.57, it… Read More »Zeta Ophiuchi
Kappa Ophiuchi
Rasalgethi
Rasalgethi, Alpha Herculis A (α Her A) is a red supergiant or bright giant located in the northern constellation Hercules, near the border with Ophiuchus.… Read More »Rasalgethi