What is the bright crescent in the photo?
Most likely the moon, partly covered by thin cloud. I can’t confirm that without the date and location.
Could it be a UFO or something unusual?
It’s very unlikely. A fixed crescent that stays in place relative to the clouds matches a celestial object far better than something moving.
Does the 21 km distance matter?
Not really. The moon looks the same from both places, and the distance only tells you where the photo was taken.
What should I avoid?
Don’t click “first comment” links or share the photo with claims you haven’t checked.
Conclusion
This photo is striking, but the likeliest explanation is simple: a moon peeking through glowing storm clouds, exaggerated by phone night processing. Checking the moon phase, the metadata, and the original file will settle it quickly. Next time a post promises a hidden detail, test the claim first. For more, see our guide to how to verify viral photos before sharing them.