There are about 100 billion stars in the Milky way. The distance between the nearest star Centaurus and the sun is about 4.22 light years (1 light year ≈ 9.46 × 10 12 km). How many years will it take to get to Centaurus by supersonic plane? (365 calculations per year, the speed of supersonic plane is 10350 M / s, so three significant numbers are reserved.)

There are about 100 billion stars in the Milky way. The distance between the nearest star Centaurus and the sun is about 4.22 light years (1 light year ≈ 9.46 × 10 12 km). How many years will it take to get to Centaurus by supersonic plane? (365 calculations per year, the speed of supersonic plane is 10350 M / s, so three significant numbers are reserved.)

T = s / v = 9.46 * 10 ^ 12km * 4.22/10.35km/s = 3.857 * 10 ^ 12s = 122000 years

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