Question: what are the aesir and vanir?
Answer: The Æsir were a group of war gods who had the more famous gods of Norse mythology, like Thor, Odin, Tyr, and others. They resided in Asgard. The Vanir were a group of fertility deities, with less famous gods,like Freyr, Frejya, Njord,etc. They resided in Vanaheim.