After more than 50 years of quiet, the moon is about to become a destination for space travelers again.

The public will soon learn the names of the four astronauts who will venture on a journey around the moon next year aboard the Artemis II rocket. The three Americans and one Canadian, to be revealed April 3 by NASA, will fly farther than any humans traveled during the Apollo missions.

Like what you've read? Oh, but there's more. Sign up here to receive in your inbox the next edition of Wonder Theory, brought to you by CNN Space and Science writers Ashley Strickland and Katie Hunt. They find wonder in planets beyond our solar system and discoveries from the ancient world.