LV-426/(other)Moon is a planet that is home to the Giger alien.
Description[]
In the context of the films' plots, LV-426 is a natural satellite (or moon) in orbit around a gas giant called Calpamos, in the Zeta2 Reticuli system, 37 light years from Earth, lying beyond the "Outer Rim". LV-426 has 86% of Earth's gravity. In Alien the atmosphere consists mostly of nitrogen and methane, but by the events of Aliens the atmosphere has been altered due to terraforming by human colonists and is breathable.
Source materials differ widely on the diameter of the planetoid: A figure of 1,200 km is given in Alien,[2] while the Aliens: Colonial Marines Technical Manual (a supplementary book to Aliens) gives a figure of 12,201 km.[3] In Aliens LV-426 is described as "a rock" with no indigenous life.[1] In Alan Dean Foster's novelization of "Alien", the travel time between LV-426 and Earth is given as ten months. In the novelization of the film "Aliens", also by Foster, the travel time is given as only three weeks.