Before revision: Overview NASA Apollo 17 astronaut Harrison Schmitt deploying an American flag on the Moon during a half phase of the Earth (photo by Eugene Cernan) Among the most prominent features of the Moon's sky is Earth.
After revision: Overview NASA Apollo 17 astronaut Harrison Schmitt deploying an American flag on the Moon during a gibbous phase of the Earth (photo by Eugene Cernan) Among the most prominent features of the Moon's sky is Earth.