A friend of mine used to work at Carnegie Observatory in Pasadena. Apparently every now and again a lawyer would come by looking for an astronomer to be an expert witness in a trial. Usually it was to testify about the position of the sun at the time of a car accident. (One party might claim that they were blinded by the sun but the other would argue that the sun couldn't have been seen in that location.)

The funny part was that it didn't really require any specialized skills. They'd just look up the position of the sun at the time of the accident in an astronomical almanac like anybody else would. But in the context of a trial it lends some weight if it comes out of the mouth of someone with a PhD in astronomy.