Words can't describe flying through an aurora. I wouldn't even know where to begin...
<p>Credit: ESA, CC BY-SA 3.0 IGO
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<bdi><a href="https://en.wikipedia.org/wiki/en:Alexander_Gerst" class="extiw" title="w:en:Alexander Gerst"><span title="German ESA astronaut and geophysicist">Alexander Gerst</span></a>
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CC BY-SA 2.0
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