Rho OphiuchiA pair of two very similar blue stars. Both are at the end of their main sequence phase and will soon start to expand to red giants.Constellation: Ophiuchus Distance: 395 light-years Orbit period of Rho Ophiuchi A and B: at least 2000 years Space between Rho Ophiuchi A and B: at least 400 AU
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Photo: NOAO, AURA, NSF |
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