Editions and Translations 

All translations of the poetic edda are taken from :

The Poetic Edda, translated by Carolyne Larrington, 2nd edition. Oxford: Oxford University Press, 2014.

Snorri Sturluson, Edda, translated by Anthony Faulkes, 2nd edition. London: The Viking Society for Northern Research, 2008.

Malory, Thomas, Le Morte d'Arthur, translated by Keith Baines (New York: Clarkson N. Potter, 1962). (This is the edition used by the IAU's WGPSN).

The Song of Roland, translated by Dorothy L. Sayers. Harmondsworth: Penguin Books, 1967. (This is the edition used by the IAU's WGPSN).

Norse Myth

Crossley-Holland, Kevin. The Norse Myths. New York: Pantheon House, 1980.

Larrington, Carolyne. The Norse Myths: A Guide to the Gods and Heroes. London: Thames & Hudson, 2017.

Outer Space

Messeri, Lisa. Placing Outer Space: An Earthly Ethnography of Other Worlds. Durham and London: Duke University Press, 2016.

NASA/JPL-Caltech's Photojournal provides access to their Planetary Image Archive (PIA), and is a rich resource for images of worlds in our solar system.