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There are various interpretations of Starry Night and one is that this canvas depicts hope. It seems that van Gogh was showing that even with a dark night such as this it is still possible to see light in the windows of the houses. Furthermore, with shining stars filling the sky, there is always light to guide you.
If you focus on a field of point light sources, such as the starry sky, you may discover the effect called coma-although the central points' image appear sharply, those out toward the frame edge show as short lines or teardrops, radiating away from the center; the farther away from the center, the greater the effect.