H. G. Wells. ‘The First Men in the Moon.’ The Strand Magazine, 20, no. 120 (December 1900): 697-705.
In this romance, Wells imagines a substance called ‘Cavorite’, after its inventor, which is resistant to gravity. The heroes build a sphere made of Cavorite and travel to the moon, where they encounter the insect-like alien race the Selenites.