Astronomers have discovered a planetary system orbiting a star, which is at a distance of 5.3 10 19 m from the earth. One planet is believed to be...

Astronomers have discovered a planetary system orbiting a star, which is at a distance of 5.3 × 1019m from the earth. One planet is believed to be located at a distance of 1.2 × 1011m from the star. Using visible light with a vacuum wavelength of 560 nm, what is the minimum necessary aperture diameter that a telescope must have so that it can resolve the planet and the star?