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Today, when astronomy has returned to the school curriculum, any high school student (well, in theory, anyone) should know: the distance from our planet to the Sun is approximately 149.5 million kilometers. This distance is also called an astronomical unit.
But, it is clear that this answer somehow had to be obtained and astronomers took several steps to do this, stretching out for more than one millennium. Below - more about each step.
xially 2 march 2021, 19:26