That marble moon is so small I had to put an arrow over it for you. So here's what it comes down to: If you want to show the Earth-sun-moon system, you'd seem to have two options.

NASA and researchers are using 3D printing to build habitats on the Moon and Mars, enabling astronauts to live off the land using local materials like regolith.

3D printing will play an important role in the future when humanity leaves Earth for destinations such as the moon and Mars, a Penn State researcher writes.

Viewers in Africa, Asia, and Australia will be able to see the blood moon in the sky—but those in the Americas will have to ...