First, I didn't read Stargate: Horizon yet. I'll begin it soon, though, I've been wondering whether Horizon is part of the whole Stargate universe and plot. Can it be counted as part of the 'canon'?
Secondly, I'd like to know if there was any fan-made or official timeline (I haven't at first glance found it on the official web site) where important events related to the Stargate universes occurs.
Thank you in advance,