Northrop Grumman Habitation and Logistics Outpost

The Habitation and Logistics Outpost (HALO), formerly known as the Minimal Habitation Module and Utilization Module, is a now canceled module that was planned to be part of the Lunar Gateway and was built by Northrop Grumman. In July 2019 NASA awarded Northrop Grumman Innovation Systems a sole-source contract for the module, which Northrop Grumman proposed as a minimal 6.1-by-3-meter design based on the Cygnus spacecraft. It was to provide life support and a place to prepare for lunar landing departure for a crew of four for at least 30 days, with docking ports, radiators, batteries and communications antennae. Structural stress testing at Thales Alenia Space facilities was completed in October 2024 and the module was delivered to the United States in April 2025, when significant corrosion was found. NASA effectively ended the Lunar Gateway in March 2026, and in June 2026 Northrop Grumman told contractors for the module to stop work. NASA had spent nearly $1.9 billion on HALO at cancellation.