Does Earth have a second Moon?

 


In 2016, astronomers discovered a small asteroid that has been dubbed as Earth's second moon. The asteroid, named Kamo' oalewa, measures less than 50 meters across and circles the Earth in a repeating corkscrew-like trajectory that brings it no closer than 40 to 100 times the distance between the Earth and the Moon.

Although Kamo' oalewa is not a conventional moon, it is considered a quasi-moon or a "constant companion" of Earth.

Kamo' oalewa is not the first asteroid to be considered as Earth's second moon. In 1986, an asteroid named 3753 Cruithne was once nicknamed "Earth's second moon" after its discovery. However, it turned out that it actually orbits the Sun, being a case of a co-orbital asteroid.

The discovery of Kamo' oalewa has sparked interest in the scientific community, as it provides an opportunity to study the dynamics of quasi-satellites and the gravitational forces that shape their orbits.

According to a new study in Nature, scientists have learned where Kamo' oalewa came from and how much longer it will stick around.

 The study suggests that Kamo' oalewa is a temporary companion of Earth and will eventually leave our vicinity

The discovery of Earth's second moon is a reminder of the vastness and complexity of our solar system. While Kamo' oalewa may not be a conventional moon, it is a fascinating object that provides insights into the dynamics of celestial bodies and their interactions with each other.

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