The line between amateur and professional astronomer has always been thin. I know professionals who have no idea how to use a telescopes (theoreticians, usually*), and amateurs who know every nebula in the sky and take pictures of them indistinguishable from those taken at big observatories.
Case in point: Damian Peach, who, in September, traveled to Barbados to observe Jupiter. It was around then that the dance of their orbits brought our two planets as close as they get, so Jupiter appears larger through a telescope. Damian also went to Barbados because Jupiter would be very high up in the sky, minimizing atmospheric disturbance.
Was it worth it? See for yourself. Using his observations, he made this video of Jupiter rotating over the course of several hours (make sure you set the resolution to 480 to see everything there):
That is just about the finest imagery of Jupiter from the ground I have ever seen! Look at the detail: the Great Red Spot, the string of brownish storms just above and trailing behind it, the white ovals, the whorls and streamers of air separating the horizontal banding. It’s breathtaking. And there’s this overwhelming three-dimensionality to it, a powerful sense that this is a giant planet. It’s simply stunning.