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Birthday · December 18, 2020

Diamond in the Sky

December 18, 2020

On your birthday, photons that left distant stars before humans walked the Earth finally completed their journey. You began yours.

Diamond in the Sky

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APOD published December 18, 2020. Credit: Mariano Ribas. A publication-date match, not a photo taken on your date. Independent of NASA.

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Diamond in the Sky

Original APOD · December 18, 2020

When the shadow of the Moon raced across planet Earth's southern hemisphere on December 14, sky watchers along the shadow's dark central path were treated to the only total solar eclipse of 2020. During the New Moon's shadow play this glistening diamond ring was seen for a moment, even in cloudy skies. Known as the diamond ring effect, the transient spectacle actually happens twice. Just before and immediately after totality, a thin sliver of solar disk visible behind the Moon's edge creates the appearance of a shiny jewel set in a dark ring. This dramatic snapshot from the path of totality in northern Patagonia, Argentina captures this eclipse's second diamond ring, along with striking solar prominences lofted beyond the edge of the Moon's silhouette.

Image credit: Mariano Ribas

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