• atom
• Galaxy (Milky Way)
• Terra (Earth)
• star cluster
• Luna (Moon) (1,700 kilometers)
• molecule
• Jupiter
• galaxy supercluster
• super sundae
• Universe
• comet
• cell
• Sol (Sun)
• telescope
• distance between the Sun and the nearest star (Proxima Centauri)
• distance between the Sun and the Earth
• distance between the Milky Way and the Andromeda galaxies

• 6,000 kilometers

Humans have sent more than 70 spacecraft to explore the Moon, our only natural satellite, from Earth. [NASA]