Bellatrix, Spica, and Omega Herculis are all good “semiquincentennial” stars. All three of them are roughly 250 light-years away, so we see them as they looked roughly 250 years ago, near the time of the Declaration of Independence.
Bellatrix, Spica, and Omega Herculis are all good “semiquincentennial” stars. All three of them are roughly 250 light-years away, so we see them as they looked roughly 250 years ago, near the time of the Declaration of Independence.