So my question, now that I'm 38 is there any hope that I could start learning more about astronomy or physics to make it more than just a hobby? I don't expect to be a Carl Sagan or Neil deGrasse Tyson, but I'd love to have enough knowledge in these subjects to research and experiment to the point where I could possibly start contributing back to the field. MIT Open Courseware has some online courses for free that cover these topics, but given I can only spend maybe 10 hours a week on this would it be a pointless venture? Not to mention my mind isn't as sharp now as it was 20 years ago when I graduated high school.
Thanks for any advice or suggestions."