Jordmåner

Jordmåner, also known as Earth's moons, refer to the natural satellites that orbit the Earth. The most well-known and prominent of these is the Moon, which is the fifth largest moon in the Solar System and the largest relative to the size of its planet. The Moon's diameter is about one-quarter that of Earth, making it the largest moon in the Solar System relative to the size of its host planet.

The Moon is believed to have formed approximately 4.5 billion years ago, likely as a result of a giant impact between the early Earth and a Mars-sized body called Theia. This impact ejected a significant amount of debris into orbit around Earth, which eventually coalesced to form the Moon.

The Moon's gravitational influence has a profound effect on Earth, including causing tides and stabilizing Earth's axial tilt, which helps to maintain a relatively stable climate. It also plays a role in the regulation of Earth's rotation, contributing to the length of a day.

In addition to the Moon, Earth has two other known natural satellites: 2006 RH120 and 2020 CD3. However, these are much smaller and have much shorter orbital periods compared to the Moon. 2006 RH120 is estimated to be about 2-6 meters in diameter and orbits Earth at an average distance of about 12 million kilometers. 2020 CD3 is even smaller, estimated to be about 1-3 meters in diameter, and its orbit is even more temporary, lasting only a few months.

The study of Earth's moons, including the Moon, continues to be an active area of research in astronomy and planetary science. Scientists study the Moon's composition, geology, and history to better understand the formation and evolution of the Earth-Moon system, as well as the broader Solar System.