It had been a cloudy day with no rain all day. I was looking for the moon early in the morning and did not see it, but saw this patch of color-changing cloud where the moon would've been. I would guess that the moon was hidden behind this cloud. The cloud changed through all the colors of the rainbow in the corresponding order within 1 minute. I thought this was a natural phenomenon, but couldn't find any information online on what it is exactly. I'm hoping the EarthSky community could shed some knowledge on this.

iPhone 7

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