I've had times when I felt I was shouting in the dark on a number of different platforms over the years, but those community don't last long as they usually grow. The Mars communities here on Lemmy have grown nicely since I came over here from Reddit. I'm sort of paying it forward for all those that preceded me that gave me joy in the late 50's and 60's when I was young developing space nerd. I simply gather the data / images to satisfy my own curiosity. Sharing it with a few like minded souls, is only but a few clicks in this digital age :)