dhaller
Senior Member
- Joined
- Nov 18, 2009
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To hazard a guess, you could have seen a meteor - the green halo could have been its copper sulfate layer burning off on atmospheric heating, and it could have looked "slow" because of perspective (its motion was oblique to your viewing path), then exploded and changed direction (in a plane normal to your view) after burnoff, thus appearing "fast".
Maybe!
DH
Maybe!
DH