Another Way to Measure the Size of the Universe 125
Another Way to Measure the Size of the Universe:
ATriangulation Trick
The distance to the Moon can be calculated by making a baseline between two spots on
Earth and using triangulation (see pages 68–69). However, this method cannot be used
to calculate the distance to the Sun, since that distance is too great. The mean distance to
the Sun is approximately 150 million km (93 million miles), which is approximately 12,000
times the diameter of Earth. A slight measurement error will have a significant effect, and
the length of the baseline that can be taken on Earth is limited. To calculate the ...
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