Here, the Moon obscures only a part of the Sun's disk. The penumbra, the lighter outer part of the shadow, creates partial solar eclipses. Rich Talcott, Discover Magazine, 29 Jan. The Moon's umbra, the shadow's dark central portion, causes total solar eclipses, where the Moon appears a little larger than the Sun and covers it completely. Millodot: Dictionary of Optometry and Visual Science, 7th edition. Zone in which the brightness varies from some illumination to zero ( umbra) in the shadow cast by an opaque object intercepting light from an extensive light source. 2023 The real show begins when the moon crosses into the darker, inner part of Earth’s shadow, called the umbra. Region of very low illumination on a dark background. Manasee Wagh, Popular Mechanics, 18 Jan. 2017 The moon will move between the sun and Earth, and the sun will cast the dark central part of the moon’s shadow, the umbra, on Earth. One of genus Umbrina of drums (family Sciaenidae). One of the family Umbridae of mudminnows. Michael E Bakich, Discover Magazine, 7 Aug. (archaic) An uninvited guest brought along by one who was invited. 2022 Unfortunately, the umbra is small, no more than a hundred miles in diameter. 2015 The eclipse is predicted to peak at 4:59 a.m., when the moon is closest to the Earth’s shadow, or umbra. Martin Ratcliffe And Richard Talcott, Discover Magazine, 24 Sep.
2021 The partial phase wraps up when the Moon exits the umbra at 12:27 a.m. Timothy Fanning, San Antonio Express-News, 17 Nov. Leada Gore | al, About 99 percent of the lunar disk’s area (97 percent of its diameter) will pass through the umbra - the dark inner part of Earth’s shadow - leaving a tiny, silvery sliver of the moon’s southern edge peeking out, the American Astronomical society said. 2023 On Sunday night, the moon will enter the umbra, the inner part of the Earth’s shadow, at 9:28 p.m. Recent Examples on the Web Both partial and total lunar eclipses occur when the moon passes through part or all of the umbra, the main part of our planet's shadow.
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