This references the problem, but doesn't explain the big question: how do they t...

		persnickety on Oct 28, 2023 \| parent \| context \| favorite \| on: Large Balloon Reflector: a potentially game-changi... This references the problem, but doesn't explain the big question: how do they turn a section of a sphere into a section of a parabola? Beach balls might not be spherical, but my bet would be on ovoid rather than parabolic.