Estimate the approximate width in km of the Perseid meteor shower, knowing that meteors are observed from July 16 to August 22.

Its width is not less than the length of the path traversed during this time (37 days) by the Earth, which is approximately 1/10 of the length of the entire orbit:
L = 2nR / 10, L = 2 * 3.14 * 1.5 * 10 ^ 8/10 = 9.4 * 10 ^ 7 km.

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