Posted 03 February 2013 - 04:02 PM
Granted, the objects would need to have been at least a couple of kilometers across at the distance of the Moon, or extremely bright, or both. I doubt these are bats, as the objects make steady progress along straight lines. Bats, as I know from personal observation, typically dart about, this way and that, very quickly. Large migrating birds, at a substantial distance, are a possibility, though the shapes of the objects don't look even remotely birdlike to me. Could be something of intermediate size at an intermediate distance. Using the same geometric logic, as above, they could have been ~1000 feet in diameter, and ~24,000 miles away, or 100 feet in diameter and 2400 miles distant, or 10 feet across at 240 miles.