You seldom hear of him, because you may not care much about Russian news. Check his Wikipedia which gives a very light overview. His Twitter is telling and he's more known for his political views than for his Space accomplishments.

I'm not the person you're replying to but Rogozin is an actual neo-Nazi: https://www.reuters.com/article/us-russia-racist/russian-ult...

Someone else in this thread linked a video of him giving the Nazi salute (is there a name for this?) after his speech at the rally mentioned in the Reuters article. I can't think of any reason someone would attend or speak at such an event, let alone salute like that at such an event, aside from being a neo-Nazi.