Van Gogh's Starry Night May Show a Real Dawn Sky From July 1889

Vincent van Gogh's The Starry Night matches a sky that really stood over southern France, researchers in South Korea report: the predawn hours of about July 22, 1889, when a thin waning crescent Moon, Venus and the Hyades star cluster gathered in one narrow patch of sky above Saint-Rémy.

Elijah Jeong-hyun Kim and Ho Jin of Kyung Hee University in Yongin and colleagues write in the paper, published Oct. 22, 2026, in Scientific Reports, that the question of invention or observation has gone unanswered for more than a century and that the painting's stars had never been tested by measurement. The canvas is conventionally dated to June 1889, and they write that the result calls for reconsidering that date.

The test turns on how much sky the painter was looking at. The group recovered his frame from F1541v, an earlier drawing of the same ridge southwest of the asylum where he lived, registered against photographs of the site: a view 18.4 degrees across the diagonal.

Among the June and July 1889 dawns on which the Moon stood above Venus, as in the painting, the authors report that both fall inside that frame on only three. On July 22 they were 18.6 degrees apart, nearly its full diagonal, with the Hyades at the center.

The Moon is also their case against June. On June 19, 1889, the dawn an earlier astronomical reading proposed, it was 63.10% lit, past half and far from the sharp crescent on the canvas. On July 22 it was 28.44% lit.

A second test compared five points in the painting's central star group with the five stars forming the V of the Hyades. The authors report that of the 120 ways to pair them, the cluster's real arrangement fits best, and that Van Gogh's own black-and-white copy of the painting reproduces its shape more accurately than the oil does.

Kim and colleagues write that the painting did not invent a sky, but carried an observed one onto canvas through stylistic amplification. They stop short of naming a single night: impressions from several neighboring dawns may have been combined, they write, and July 22 is the center of a window from July 20 to 24.

The paper carries a competing-interest declaration: Kim founded and runs SLLAB, a Yongin company where two of his co-authors work, and it states that SLLAB may pursue commercial activities derived from the work.