So it had to be that those old star catalogs were bad.

所以那一定是那些旧的星表不好。

The problem was not with those old star catalogs, the problem was with the predictions.

问题不在于那些旧的星表，问题在于预测。

He'd been tracking the position of Uranus across the night sky using old star catalogs, and it didn't quite go around the Sun the way that his predictions said it should.

他一直在使用旧的星表追踪天王星在夜空中的位置，但它并没有按照他的预测所说的那样绕太阳公转。