It would be nice if we could get some idea of its size and velocity. Does anyone know that the structures to the left of "thing" are? Can we guess how far away they are, and trace back to the beginning of the visible arc? Or, measuring the arc itself, can we determine the velocity by the distance covered in 1/20 of a second? If we could determine a size by comparison, even measuring the width of the track and comparing to the power pole or the items in the surroundings, it would shed a bit of light on this. The power pole outside my house is about a foot in diameter; I've never been to Australia, so really can't tell. Maybe Kate or some of our other Aussie members can help us out here.

It's an interesting challenge, anyway. I'll do my best. smile