If astronomy includes the possible detection of previously unknown sizeable objects in space which might put an end to our activities on this planet, then I don

If astronomy includes the possible detection of previously unknown sizeable objects in space which might put an end to our activities on this planet, then I don't agree. Climate alarmism (that's not intended as a perjorative word: it's sensible to be alarmed if there is something to be alarmed about) is based on the validity or not of statistical conclusions regarding climate data. Objects in space can and do collide with Earth if that's their trajectory. No theory or hypothesis is required - just data.