Reading · Partie 6
There is an ever increasing number of objects in low Earth orbit. A camera, a glove, a hand tool, even a toothbrush: they are all up there, above the clouds, going around and around the Earth. There are also thousands of pieces of metal and plastic. Some of them are only about the size of a fingernail. (1) ..........…
Débloque tous les examens, des simulations illimitées, les 80 étapes du jeu et plus encore.