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Immense Knowledge
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日期:2024-05-09
1 – The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (equal to 186,287.49 miles per second). 2 – It takes 8 minutes 17 seconds for light to travel from the Sun’s surface to the Earth. 3 – 10 pe...看更多