bjr
vitesse lumière 300 000 km ............ 1 seconde
dist terre lune n km........... 1,28 secondes
=> n = 300 000 x 1,28 = 384 000 km
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bjr
vitesse lumière 300 000 km ............ 1 seconde
dist terre lune n km........... 1,28 secondes
=> n = 300 000 x 1,28 = 384 000 km