Colors of an aurora depend not only on which element is emitting light, but also on *where* it is. Oxygen at high altitudes glows red; at lower altitudes it glows green. Purple nitrogen is lower still.
Weird, right? 🧪

I hope you're here! Happy Jagr day!!!

Congratulations!

I wrote them both down if you want to delete the tweet for security 👍

Thank you!

I have two people who I would like to invite!

Thanks! I'm glad I finally got an invite!