ET2020 wrote:Do you know of any good resources to learn how to use JS9? It's seems confusing and I'm not sure how to answer questions about it.
I agree that it can be confusing/intimidating at first. Keep in mind that this year, you won't actually have to use the JS9 software in competition, just be able to understand screenshots of its various functionalities.
I wrote a very basic-level introduction to JS9 here. Beyond the guide, I think it's helpful to play around on the site and see what it can do. To perform well on JS9 questions at high-level tournaments, be sure to also understand fundamental concepts in multi-wavelength astronomy, energy spectra, light curves, etc. The goal of JS9 is to be able to apply theory to understand observational data! In case you haven't seen it, there's a JS9 question on the MIT exam (see #19) and detailed solutions here, so that might give you a feel for what sort of questions to expect.