4 ms·

Pardon my extreme ignorance, but what is the greenish/yellowish band?

• tomfanning 8y ago
  Airglow! https://en.wikipedia.org/wiki/Airglow https://en.wikipedia.org/wiki/Airglow
• lisper 8y ago
  That's not ignorance, that's curiosity. And it's nothing to be ashamed of.
  • system2 8y ago
    It is really hard to post a comment without being afraid of being ridiculed these days.