The parallax b of Ophiuchus is 0.029 “. Determine how long the light travels from the star to the Earth.
| November 15, 2020 | Education
decision
r = 1 / p; r = 1 / 0.029; r = 34.5 pc; r = 34.5 * 3.3 = 113.85 sv. years old.
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