What is the average IQ of an astronomer or space scientist?

I would have to guess that it must be above 120 or something. My impression about the ease of 'doing' astronomy, creating deep insights from data, and developing new technologies, is that this process becomes easier as IQ increases. For example, and this is my own private, non-scientific assessment, with an IQ of about 120 you can just begin to be functional as an astronomer. With an IQ of 130 - 150 you are in the Major Leagues and can expect to have a very productive career. At IQs above 150 you join the ranks of the very few 'Greats' in human history who have developed the major ideas of astronomy.

But, and I really have to stress this, your basic personality counts for nearly as much as your IQ in astronomy. If you know how to 'sell yourself' and your ideas, if you are a good speaker and have a commanding persona, and can work with people to define a path to a goal, you can have a very exciting career as well. There is plenty of room in astronomy for good managers!

It seems that everyone I know in the profession did extremely well in college math and physics courses. There are only 6500 astronomers in the country so there must be something about the job that heavily selects in favor of uncommon qualities, and raw intelligence and creativity are two of the most important ones.

The technical side of science is murderously hard math, physics and chemistry to name a few subjects. Not only do you have to be just plain 'smart' to do this work day in and day out, but to make NEW contributions you have to be better than just smart.

I also don't know of any astronomers who became successful, but entered the field in an unconventional way. For instance, taking several years off between high school and college, or college and graduate school. We all seem to have just slogged it out year after year from high school to PhD with no breaks along the way to 'find ourselves'.