re: Fireball in Australia
Green meteors are rare, but not unheard of. I saw one when I was about 10 years old (1957). I only caught a brief glimpse of it, but my impression of it was that it was a green disk about half the size of the full moon, with a trail of red sparks coming out the back. I remember looking it up and learning that that particular type of bolide was rare, but it had been seen before.