Can We Forecast the Number of Sunspots?

Firstly: what is a sunspot? Sunspots are a temporary phenomena on the Sun's photosphere that appear darker than the surrounding areas. The reason why I have selected the sunspots dataset for time series analysis is sunspots appear on an 11-year solar cycle, meaning we should expect to see a seasonality component to the data. I will be modelling the seasonality trend using two different methods, the ARMA model and LSTM model. The data that will be used is from 1749 to 2013 and is the monthly average at each month.