As nearly all of my readers, particular those who live in the US, will know, there will be a solar eclipse on 21 August. For lucky viewers in a narrow band of territory running West to East across the US, it will be visible as a total eclipse – when the Moon completely obscures the Sun and it suddenly goes dark for a short period of time.
Image from NASA
Although there is, on average, a total eclipse somewhere on Earth every 18 months, for each eclipse the region of on the world where a total eclipse can be seen is relatively small. Unless you are a so-called eclipse chaser – people who travel long distance to see solar eclipses, you will probably only get a change to see a total eclipse within 1000 km of where you live once or twice in your lifetime. The last time that one has…
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