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auroral line

noun
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Definition of auroral line

: a prominent green line in the spectrum of the aurora borealis and aurora australis apparently due to the presence of oxygen in the upper atmosphere

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“Auroral line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/auroral%20line. Accessed 16 Jun. 2021.

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