In an effort to restore competition, nasa plans to provide funds to support development and flight tests of a second human lunar landing system, even as the agency steps up its commitment with its current contractor, SpaceX. The new program, known as Human Landing System (HLS) Sustaining Lunar Development (SLD), would parallel a SpaceX initiative that began last year with the goal of landing astronauts on the surface of the Moon as early as 2025.
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