I think it was the movie passengers that had some kind of net at the front. Looked cool but particles travelling at more that 17500mph are probably going through whatever they like. Some form of fluid airframe is more doable as in let it hit, absorb the impact and fill the gap but this is me thinking rather than any form of science. And I think radiation is probably as big if not bigger an issue. I presume proximity to planets would increase the likelihood of encountering things