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A telescope allows us to see very faint objects mostly due to the large size of the opening that light passes through, known as the aperture. Like the pupil in the human eye, the larger the diameter of a telescope's aperture, the fainter the objects we can detect with it. An amateur astronomer claims that she likely could see most, but not all, of the stars in the table while using a telescope with a 160-millimeter (mm) aperture.