I want to make a question about state-of-the-art mirror technology and beam divergence for space and astronomy applications. Since engineering questions seem to be, if not considered off-topic, at least frowned upon by the moderation (beats me why).
So i'm wondering what would be the best way to ask that question that would be deemed acceptable. Since the question has relationship with astronomy and space applications, i'm wondering if i can rely on that for making the question on-topic
link to the question in main: Mirrors and light beam divergence technology limits