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Some people believe we are in a new Enlightenment, with science making food plentiful and likely to make energy cheap enough to be unnoticeable in the next few decades as well. We share one other thing in common with the 18th century - solar activity. Scientists have been counting sunspots with small telescopes since 1610 so it was quickly learned that the Suns activity increases every eleven years, according to the interval in the growth of the number of darker and colder spots in comparison with the rest of its surface. The more spots that appear, the more luminous the surrounding areas are, and our star shines brighter. Even with telescope data, the indices used by scientists disagreed on solar activity of dates prior to 1885 but a new effort to standardize the historical results finds that the solar activity of our times is very similar to the Enlightenment. And it confirms that the eleven-year cycles don't always have the same intensity and probably never did. The more intense peaks of the Suns luminosity were produced in the 20th century, which experts have called the modern maximum but there were also elevated values in other periods. It has been a huge surprise to observe that in the 18th century the levels of the Suns activity were practically the same as they are now, says José M. Vaquero, researcher at the University of Extremadura (Spain) and co-author of the research, which is a review of the number of sunspots recorded in the last 400 years. All this after coming off the Quietest Solar Minimum Since 1913.
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Buzzard Roost Certificate
History: A Century of Amateur Radio and the ARRL
German Enigma machine
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a German sub, 1941:
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