![]() ![]() ![]() Had the tasimeter worked, the scattering of sunlight that we see as the inner corona would have misleadingly given Edison the Sun's surface temperature, 6,000 ☌. It wasn't until around 1940 that physicists Walter Grotrian, Bengt Edlén and Hannes Alfvén found the solar corona to have a temperature of at least 1 million ☌. AMERICAN ECLIPSE tells the story of these pioneering scientistsplanet hunter James Craig Watson, astronomer Maria Mitchell, and inventor Thomas Edisonwho gathered in the West with an extraordinary cast of supporting characters on a day when the sun hid and far more was revealed. He was unprepared for the strength of the signal, however, and his instrument's needle pinned at its maximum reading. Edison brought one of his devices, a tasimeter, to measure minute shifts in heat from the Sun's corona during the eclipse. But, as Baron relates, 31-year-old whizz-kid inventor Thomas Edison gained the lion's share of publicity, even though he was just tagging along. Nelson Nature 539, 491–492 2016), travelled to Rawlins, Wyoming, to witness it. ![]() (I read this book in draft and provided a blurb.) A group of eminent scientists, including astronomer Henry Draper and his wife, Anna (see S. ![]() In American Eclipse, journalist David Baron harks back to the total eclipse visible in the United States in July 1878. ![]()
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