Vox The 2017 Great American Solar Eclipse left Chris Chartier feeling, well, a little jealous. Chartier, like so many Americans, was awed by the whole country coming together to celebrate a force of nature. Chartier is a psychologist, and he also started to think of how precise the eclipse forecast was. Astronomers knew, down to the second, when the moon would cross the path of the sun; where, precisely, its shadow would land; and for how many seconds the sun would appear to be blocked out for those on the ground. Chartier’s field — social psychology — just doesn’t have that type of accuracy. “Things are really messy,” says Chartier, who’s an associate professor at Ashland University in Ohio. Psychology “is nowhere near being at the level of precision of astronomers, or physicists.”