The name Chitauri "Space" makes me assume it's in the vacuum of space, right? But we've seen countless characters (Loki, The Other, Ronan, Nebula, Thanos, etc.) in Chitauri Space, without some form of breathing equipment... So is there oxygen in this part of space? This wouldn't be a problem for me, but I remember Loki died of asphyxiation, which is the lack of oxygen, but somehow survived the LITERAL VOID when falling off the Bifrost and stayed in Chitauri SPACE for who knows how long.
I honestly don't know what I'm asking but the two main questions are;
If Loki can survive without oxygen (as seen at the end of Thor and the beginning of the Avengers), why did he die by suffocation?
Is there oxygen in Chitauri Space?