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A visualization of the Moon’s shadow during the June 10, 2021 annular solar eclipse showing the antumbra (black oval), penumbra (concentric shaded ovals), and path of annularity (red). Images of the Sun show its appearance in a number of locations, each oriented to the local horizon. This is an annular (“ring“) eclipse -- not to be confused with “annual.“ The central part of the shadow, where the silhouette of the Moon is completely surrounded by a ring of sunlight, is called the antumbra. The part of the shadow outside the antumbra, where observers see a partial eclipse, is the penumbra.
