The artillery soldier on the heath is referred to as Bombadier yet has no chevrons on his arms. Bombadier is the same as Corporal in the artillery regiments.
At a speed of 1000 km per second, it would take over 3000 years for the alien spacecraft to travel to earth from the planet obiting Ross 128. Moreover, the binary-encoded music was sent only two years ago, and Ross 128 is 11 light years from earth.
A full moon is near to the horizon at dawn, just before the sun comes up. This means the sun would be shining on the far side of the moon; and yet the moon being full means the sun is behind the camera, shining on the near side of the moon.