Never thought I would say it, but joecavalry raises some good points for consideration. On the other hand, however, it is easy to get stuck in the job you settle for and never go after your dreams. If that's the route you go you're going to have to go at it with great intentionality to make sure you don't lose sight of your dream. Age unfortunately brings a certain cynicism and that voice telling you to play it safe will probably only get stronger - it'll be, "you've got a good job why throw it away"?

I would recommend talking with people in both professions, visit on site and shadow if you can. Feel them both out more. Ultimately, you seriously have a lot of time to figure this out. Years. Allow yourself to breath, don't worry over it too much. I'm a college senior and I'm still making up my mind, as are most of the seniors I know actually. Adults pretend they know where they're going, but usually we're just as unsure as the next person (just better at faking it til we make it).

Dude I lovw astronomy and I am actually going to be an astronomical physicist so I would say do it. But the market for us isnt grand and your other choices are awesome too like criminal psychology. I would weigh my choices first and then decide.

Whether or not you will succeed at your dream is an important question, not only for survivability reasons, but if it is truly your dream or goal, if you don't do something with it, what was the point? At the same time, accomplishing that goal is up to you, is something you have control over, if the purpose of choosing this career is more ideal to you than I'd argue you should pursue it and try to do something with it, but don't if you don't think you will get anything out of it. Like Jace said try to get more familiar with both fields and try to figure out what feels more right to you. I am sort of in the same toss up, as I'm not too experienced with any specialization of any field or taken a deep personal interest. I have loved the idea of physics, of understanding reality, and I love to hear of theories and some concepts of quantum physics, I don't have much of an education in basic physics etc though it looks quite amazing. I took one physics class in high school, and it wasn't much of a good semester for me therefore I only learned a decent amount (of which my memory of has deteriorated a little bit of). Remember we still have plenty of time till we have to truly decide which route would be best for us, so you got plenty of time to figure it out.

do what you love who cares about the pay if you are doing whast you love then you want have to spend money to entertian yourself