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"Imaging Ultraviolet Spectrograph instrument detected major changes as dust from the comet slammed into atoms and molecules in the upper atmosphere, high-energy collisions that caused the thin air to glow."With this, the Recife event, and the 'Pacific lights' event the month before that, it looks like our atmosphere has reached a certain threshold of comet dust saturation.
Comment: This is just one of several that have been spotted this week.