Back to the moon — sort of. Next month, as soon as April 1, NASA will launch its Artemis II mission , officials announced last week, and carry four astronauts into orbit around the moon. At one level, that isn’t very impressive: Artemis is just replicating the Apollo 8 circumlunar mission, almost 60 years later.  When Apollo 8 flew, human beings had never seen the far side of the moon with their own eyes, nor seen the Earth from its satellite.  Astronaut Frank Borman on that mission snapped a