Houston, April 8 -- The Artemis II astronauts snapped a stunning shot of Earthset - the moment when the Earth dips below the Moon's horizon - on their long journey back home Tuesday after wrapping up a historic lunar flyby. NASA released the photo of Earth dropping below the rugged lunar edge in a deliberate nod to the iconic Earthrise image taken by an Apollo 8 astronaut in 1968. That shot 57 years ago helped capture the public's imagination when it was taken by US astronaut Bill Anders during the first space mission to carry humans around the Moon. The modern version pairs the delicate, watery planet Earth with the harsh, huge curve of the Moon, separated by black space. The crew of four - US astronauts Reid Wiseman, Christina Koch, and Victor Glover, teamed with Canadian Jeremy Hansen - are on a historic mission to loop around Earth's natural satellite as part of a broader program paving the way for a Moon landing in 2028. P11...