This list covers 1 moon whose name starts with U: “Umbriel.” Natural satellites like this one orbit planets throughout the solar system, varying widely in size, surface type, and origin. They help scientists understand how planets formed and how the solar system has changed over billions of years.

Moons are natural bodies that orbit a planet, held in place by gravity rather than circling the Sun directly. They range from tiny, irregular chunks of rock to large, spherical worlds with complex geology and even possible underground oceans. Galileo’s discovery of Jupiter’s four largest moons in 1610 was a turning point in science, showing for the first time that not every object in the sky circles Earth.

Below you’ll find the table with Moon, Parent Planet, Diameter (km), Discovery Year, and Description.

Moon: The name of the natural satellite. It helps you identify the moon and look it up in other sources quickly.

Parent Planet: The planet this moon orbits. It tells you where in the solar system the moon lives and puts it in broader context.

Diameter (km): The moon’s width measured across its center in kilometers. It gives you a fast way to compare its size to other moons you may know.

Discovery Year: The year astronomers first identified and recorded the moon. It shows how our knowledge of the solar system has grown over time.

Description: A short overview of the moon’s most notable features and background. It gives you the key facts you need to understand what makes each moon interesting.

Moons

Descriptions