What Makes a ‘Supermoon’ Look Bigger and Brighter?

‘超级月亮’为何看起来更大更亮？

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A supermoon occurs when the full moon coincides with lunar perigee—the point in its elliptical orbit closest to Earth.
Because the Moon’s orbit isn’t perfectly circular, its distance from us varies between about 363,000 km and 405,000 km.

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