This list covers 1 moon whose name starts with the letter Z — “Zelus” — a small, distant world orbiting one of the giant planets in our solar system. Moons like this one are natural satellites, ranging from large rocky spheres to tiny irregular bodies captured long ago. Scientists study them to better understand how planets form, how solar systems evolve, and what conditions might support life beyond Earth.
Moons are natural objects that orbit a planet, held in place by gravity. Our own Moon has guided human calendars, mythology, and exploration for thousands of years — and it was the first place beyond Earth that humans ever set foot on. Today, astronomers have confirmed hundreds of moons across the solar system, from gas giants like Jupiter to distant ice worlds.
Below you’ll find the table with Moon, Parent Planet, Diameter (km), Discovery Year, and Description.
Moon: The official name of the natural satellite, as recognized by the International Astronomical Union.
Parent Planet: The planet this moon orbits, so you can quickly place it within the solar system.
Diameter (km): The approximate size of the moon in kilometers, giving you a sense of how large or small it is compared to others.
Discovery Year: The year astronomers first confirmed the moon’s existence, showing how our knowledge of the solar system has grown over time.
Description: A short summary of the moon’s key traits — its orbit, composition, or how it was likely formed — so you get the most important facts at a glance.
Moons
| Moon | Parent Planet | Diameter (km) | Discovery Year |
|---|---|---|---|
| Zelus | Jupiter | 2 | 2000 |