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7 godz. temu · One astronomical unit (about 150 million kilometres; 93 million miles) ... (about 1/10,000 the density of air at sea level, and 1 millionth that of the inner layer of the convective ... Venus, and the Sun. Careful observations of the 1769 transit of Venus allowed astronomers to calculate the average Earth–Sun distance as 93,726,900 ...
