The multibillion-dollar series of missions aims to return astronauts to the moon’s surface by 2028 before China, and establish a long-term US presence there over the next decade, building a moon base that would serve as a proving ground for potential future missions to Mars.
The lunar flyby will plunge the crew into darkness and brief communications blackouts as the moon blocks them from NASA’s Deep Space Network, a global array of massive radio communications antennas the agency has been using to talk to the crew.
The flyby will last about six hours, during which the astronauts will use professional cameras to take detailed photos of the moon through Orion’s window, showing a rare and scientifically valuable vantage point of sunlight filtering around its edges.
The crew will also have the chance to photograph a rare moment in which their home planet, dwarfed by their record-breaking distance in space, will set and rise with the lunar horizon as they swing around, a celestial remix of a moonrise seen from Earth.
A team of dozens of lunar scientists positioned in the Science Evaluation Room at NASA’s Johnson Space Center in Houston will be taking notes as the astronauts, who studied an array of lunar phenomena as part of mission training, describe their view in real time.