Astronomers have discovered a planetary system orbiting the, Physics

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Astronomers have discovered a planetary system orbiting the

Astronomers have discovered a planetary system orbiting the star Upsilon Andromedae, which is at a distance 4.2 1017 m from the earth. One planet is believed to be located at a distance of 1.8 1011 m from the star. Using visible light with a vacuum wavelength of 550 nm, what is the minimum necessary aperture diameter that a telescope must have so that it can resolve the planet and the star?

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