Sighted the new crescent? Set the date, time, and place, then choose your photo — the Lab analyses it automatically and logs it for the month. It rates how plausible the sighting is from the astronomy at your location, your photo's metadata, and an AI look at the image.
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The confidence score blends astronomy (the dominant factor), your photo's embedded date/GPS, and an AI image check. It is an aid, not a verdict — an actual sighting is judged by a qualified observer. Photo GPS is removed from images shown here.