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a sequence of stars, including the Sun, Vega, Arcturus, and VY Canis Majoris, each shown with its name and diameter in kilometers, as they appear on a scale line that moves from left to right across the screen, illustrating their relative sizes. The stars are depicted as glowing spheres of varying sizes against a black background, with the scale line and the stars moving from left to right, ending with the largest star, VY Canis Majoris, moving off-screen to the right.