Black holes

Recently, I have been thinking a lot about SPACE; perhaps, it is all the Star Trek re-runs I have been watching.  I found this lesson on Blackholes:  that has a great interactive lesson link to Blackhole that has a link to the hubble site.  What other resources do my Science friends use?  I am thinking of making Fall 2019 the season of the Blackhole but I need to get my lessons in line.

Is anyone else thinking about next year?