I love physics, especially particle and astronomical physics, and for my intel research class which I will be taking next year, I would like to study them more. For this class, I need to choose a topic of study to which the answer is unknown or poorly understood and "play scientist" for a year. Unfortunately, considering that this is high school, experimentation will not be easy in these fields, so I am having a problem choosing a subject that will be cheap and easy to test, so I need advice. What should my field of research be? thanks in advance.