Now I bet that's something those astronomers haven't thought of. They're so cool with their, predicting events that will happen a million years from now via the information gleaned from a few tiny pricks of light in the sky (damn they are amazing!), I bet they can't figure out what will be in fashion on the alien planets that pass by. :P
I am constantly amazed by what astronomers seem to be able to do.
I for one, plan to dress up. Just in case.