Meteors seem to be raining down on New Zealand, but why are some bright green? - The Conversation

The green glow of an aurora is caused by oxygen ions in the upper atmosphere. Some meteors can glow in this way, too, but only if they are extremely fast.

New Zealand may seem to be under meteor bombardment at the moment. After a huge meteor exploded above the sea near Wellington on July 7, creating a sonic boom that could be heard across the bottom of… [+4578 chars]

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