Word: triangulum
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Dates: during 1920-1929
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...other half of the prize was given tr. Dr. Edwin Hubble of Mount Wilson Observatory for measurement of the distance to two remote spiral nebulae in Andromeda and Triangulum. He found in these nebulae numbers of variable stars. Measurement of the brightness of these stars established that they were 4,000 to 8,000 times as bright as the sun. From this date, he calculated the distance from the earth to those stars as 930,000 light years,* or about five and a half quintillion (5,500,000,000,000,000,000) miles. As compared to the belief of only...
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