And because the air around us scatters blue light the most (which is the reason a clear daytime sky is blue), the light that falls on the Moon is redder than normal sunlight. This happens because our atmosphere bends a bit of sunlight into the shadow and onto the Moon’s surface. One of the coolest effects during a total lunar eclipse is that the Moon doesn’t just darken - it also changes color. Storms and large amounts of clouds along the limb of our planet (from the Moon’s point of view) can make the lunar surface appear even darker. All these components reduce the air’s transparency. The air around us contains water droplets, dust, pollen, and ash. Our atmosphere also plays a big part in how the Moon appears. Because the Moon crosses a large range of the shadow’s depth throughout totality, the appearance of its face will change significantly as the eclipse progresses. You’ll easily see that the Moon’s southern half looks darker than its northern half. 8 doesn’t reach the longest possible duration, because only the Moon’s southern edge touches the center of our planet’s umbra. So, when totality arrives, be sure to look for the difference in brightness between the northern and southern edges. The more central the path, the darker the Moon’s surface will get, especially around mid-eclipse. Sometimes it passes close to the center and sometimes it crosses the outskirts. The Moon looks different from one totality to the next because it takes different paths through Earth’s shadow. Rate the darkness of the Moon during totality views will come in eastern Maine, and even there, observers will witness more than an hour of totality. In the continental U.S., everyone with a clear sky will experience at least part of totality, and those who position themselves as far west as possible will have the best views. Northwestern parts of South America will see some totality, but the finest views come in Asia, Australia, and North America. The entire eclipse will be visible to much of the world, excluding Africa and much of Europe.
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