bonjour
300 000 x 3 600 x 24 x 365
= 9.4608 x 10 ¹² km
Une AL = 9.4608 x 10 ¹² km
4.3 x 9.4608 x 10 ¹² = 4.068144 x 10 ¹³
distance Proxima = 4.038 144 x 10 ¹³ km
100 km /s = 100 x 3 600 = 360 000 km / h = 3.6 x 10 ⁵
4.038 144 x 10 ¹³ : 3.6 x 10 ⁵
≅ 1.1217066.... x 10 ⁸ h
