system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel Cinimatic Universe] Are Asgardians extremely long lived or could the Bifrost traverse time as well as space?

Ancient legend tells of Asgardians coming to Norse culture and teaching us language and civilization and legends of Odin and Thor and Loki, but Loki revealed that asgardians being immortal was a myth of humans. Could the Bifrost travel in time as well in space working as a time machine or does time move differently in the realms? 

Side question, the 9 realms they speak of, are they literal realms as in pocket dimension type things or sectors of space that contain known planets and civilizations?
gpt
I believe the suggestion is that Asgardians are very, very long-lived. The evidence of this is in the Odinsleep, which seems to be super-advanced Asgard technology (indistinguishable from our perspective from magic) which extends the life of Odin.