Forensic astronomy plausibly dates Van Gogh’s sky to July 1889, but the painting may combine many nights. Careful, genuinely interdisciplinary work; useful hypothesis, no celestial smoking gun.
https://www.koco.com/article/van-gogh-starry-night-real-sky-1889-study/74221131
KOCONew study traces van Gogh's famed 'Starry Night' to an actual night sky from 1889Scientists have traced Vincent van Gogh's "The Starry Night" to a celestial scene that suggests a new date for one of the world's most famous paintings.