I thought I'd start a separate thread for any info that people get about particular public events. Reason being, is because these key events make a massive difference to the game in terms of loot, experience, heroic variations and mechanics.
Just going to start with the numbers so you can get into perspective how vast the content is on these, mainly due to Secret Events which are adhoc and can be set off by certain activities.
European Dead Zone
Visible Public Events - 13
Secret Public Events - 35
Titan
Visible Public Events - 3
Secret Public Events - 8
Nessus
Visible Public Events - 13
Secret Public Events - 33
Io
Visible Public Events - 5
Secret Public Events - 15
All can be turned into heroic versions so you can double these encounters.
I'm going to grab the other key posts like @jSyn66 found but would be good to have any strategy posts and encounter details either challenging ones or ones that drop sweet look.