By one of those cosmic coincidences, when we view a solar eclipse from the Earth, the moon’s disc appears to be the same size as the sun. But here’s a transit of the moon across the sun that has never been seen by human eyes before. It was captured by the STEREO-B satellite. Watch the animation of the images for the full, staggering, effect. Absolutely spectacular.
(hat tip to the Bad Astronomer for the link)

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