The next major milestone is expected overnight, at which point the astronauts will enter the "lunar sphere of influence" where the Moon's gravity will have a stronger pull on the spacecraft than Earth's. HOUSTON: The Artemis astronauts have taken in sights of the Moon never before seen by human eyes, crew members reported on Sunday (Apr 5) as their spacecraft crossed the two-thirds mark on their journey to a long-anticipated lunar flyby . As the astronauts went to bed in the early hours of