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Why The Moon Turns Red During A Total Lunar Eclipse
Lunar eclipses occur when the moon passes into the Earth's shadow. In another 25 minutes, the last of the penumbral shading should be gone, too, leaving the full moon at its normal brilliance. During totality, the blood moon will be visible, making the moon appear to be bright red. But once science had explained the celestial mechanics at play, astronomers could predict when they will occur and where they will be visible. So, why doesn't every full moon bring a lunar eclipse? Webcasts are available at Slooh. The moon will be at perigee—its closest point to Earth—just 59 minutes before the height of the eclipse. Once every 19 years, there's a long gap between total lunar eclipses; this occurs because of the geometry of the positions of the Earth, sun and moon. The penumbral phase will start at 9: Indigenous tribes in North America kept track of seasons by observing the full moons, giving them names that related to their time of year. The term is also sometimes used to describe four total lunar eclipses in a row. Learn what causes a lunar eclipse and how it gains its crimson coloring. Deanne Fortnam Lunar Tetrad and the — Blood Moons The term Blood Moon is also sometimes used to refer to four total lunar eclipses that happen in the span of two years, a phenomenon astronomers call a lunar tetrad. Super blood moon over Sriracha harbor. But the whole event will last much longer. If you have binoculars or a telescope handy, you might see a little more detail on the lunar features, but mostly you can expect more mottled red inside the viewfinder. Because of the geometry of Earth, sun and moon, sometimes there are periods during which no lunar eclipses happen for a long time.
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