Lethor
Lethor is a minor planet in the Arcturus system, located approximately 1.3 light‑years from the central star. It is a rocky world with a thin, nitrogen‑rich atmosphere and a surface composed mainly of silicate minerals and volcanic basalt. The planet’s orbital period is 284 Earth days, and it rotates on its axis once every 30.5 hours, giving it a relatively short day. Although Lethor has no indigenous life, it supports a sparse population of microbial life forms that thrive in the planet’s subsurface aquifers, an environment that has attracted scientific interest for astrobiology research.
The planet was first observed by the Deep Space 3 survey mission in 2033, and preliminary data
Lethor is currently a target for further exploration by the Interstellar Exploration Alliance, with proposals to