He is great for tV and this subject matter...not sure he comes across as at all pretentious.
There appears to be a real surge of quality programming and interest stemming from the advances of theories and dicoveries in the sky above within the last 10 years. I admit, I am myself caught up in the wave. Had a telescope for a year now and actively involved in our city's astro society and deep sky observing events. It's plenty geeky but I don't care...it's quite fascinating and rather satisfying.