Sirius is a binary star two stars orbiting their center of, Ask an Expert

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Sirius is a binary star (two stars orbiting their center of gravity) they are separated by 2 light hours (2.3E-4 light years) and are 9 light years from earth (no unit conversion from light years to meters is necessary).

a.) What diameter aperture must we use in the telescope to resolve the red light(700 nm) from the two stars?

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