“And just how do they ascertain a “habitable zone”? There are many very narrow variables necessary to sustain life here on earth. What is the termperature there? The atmosphere?, the gravity? The level of radiation? The tilt of the planet on its axis? etc. etc.”
I wonder if people who have spent their entire lives dedicated to this field of study would think of questions like this or even better, more technical ones.
If they did it would be a pretty obvious thing to address them. Unless, of course they were just looking for headlines, government funding and requests to speak at conventions and symposiums. In which case they would avoid these obvious questions as much as possible.