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- Running the ESO calculator over the web is really slow and painful
- The ESO model doesn't include twilight at all!
- Looks like there is an issue with the sky brightness measurements once the moon gets above a certain elevation. OR, the ESO model fails if it gets too close to the moon. I'm going back and forth on who to blame this on. Need to run an experiment with the ESO model to make sure getting closer to the moon keep making things brighter correctly.