The Second Satellite
by Edmond Hamilton (1930)
This novelette comes from the August 1930 issue of ‘Astounding Stories of Super-Science’, one of the pulp-era science fiction magazines.
Two pilots travel by plane to another world, orbiting the earth between the earth and moon (!). There they find two civilizations of men and frog-men. As silly as it sounds, this is a well written and exciting adventure from the golden age. Sure, science and biology makes no sense but Hamilton shows why he was one of the great writers of this era.