Help solve the mystery of epsilon Aurigae, a star that has baffled scientists since 1821. You don’t need any prior scientific training to observe and record the changing brightness of this star— this site provides all of the tools you need to become a citizen scientist including a training program that begins with stars that are easy to find and observe. Slowly the stars become more challenging as you go down the list. By the time you reach epsilon Aurigae at the bottom of the list, you’ll be an expert variable star observer contributing real data to professional scientists.