Mesklin

Mesklin is the name of a fictional planet in the science fiction novel Mission of Gravity (1954) by Hal Clement.

Mesklin is notable for its extremely large size, high gravity, rapid rotation, and unusual shape. Due to its rapid rotation, the planet is oblate, with a diameter much larger at the equator than at the poles. The gravity at the equator is relatively low, but increases drastically towards the poles, reaching hundreds of times Earth gravity. The extreme gravity gradient poses significant challenges to both native life and potential human explorers.

The Mesklinites, the intelligent inhabitants of Mesklin, are adapted to the extreme gravity and pressure through their morphology and physiology. They are centipede-like creatures, possessing tough exoskeletons and segmented bodies capable of distributing weight and enduring the crushing forces. They are technologically advanced, although their technology is heavily influenced by the planet's unique environment.

Mission of Gravity focuses on the efforts of human explorers to retrieve a downed probe from Mesklin's north pole. The story explores the challenges posed by Mesklin's environment and the ingenuity required to navigate such a harsh and alien world, as well as the interactions between humans and the Mesklinites. The planet itself is a significant "character" in the book, shaping the narrative and the actions of all involved.