Norse cosmology is the study of the cosmos (cosmology) as perceived by the North Germanic peoples. The topic encompasses concepts from Norse mythology, such as notions of time and space, cosmogony, personifications, anthropogeny, and eschatology. Like other aspects of Norse mythology, these concepts are primarily recorded in the Poetic Edda, a collection of poems compiled in the 13th century, and the Prose Edda, authored by Icelander Snorri Sturluson in the 13th century, who drew from earlier traditional sources. Together these sources depict an image of Nine Worlds around a cosmic tree, Yggdrasil.
Time and space
Concepts of time and space play a major role in the Old Norse corpus's presentation of Norse cosmology. While events in Norse mythology describe a somewhat linear progression, various scholars in ancient Germanic studies note that Old Norse texts may imply or directly describe a fundamental belief in cyclic time. According to scholar John Lindow, "the cosmos might be formed and reformed on multiple occasions by the rising sea."