Which group of words in the passage helps the reader understand the meaning of the word catastrophe? Birth of the Moon The moon and the stars in the night sky appear very beautiful. We love the sight of a full moon in the sky. But did you know that the moon may have been a result of a major catastrophe? Scientists disagree about the existence of the moon in Earth's orbit. Some scientists believe that the moon is a part of Earth that got separated in an explosion and now orbits it. The moon has been circling Earth for more than four billion years. It is known as Earth's satellite. Some scientists believe that the moon was a separate and independent heavenly body that accidentally came too close to Earth. This caused Earth to capture the moon in its orbit by its gravitational pull because the Moon is a much smaller body than Earth. However, studies have proven that the moon was formed when a smaller planet crashed into Earth when Earth was still quite young. This caused a huge explosion, and huge amounts of material and chunks of both Earth and the foreign planet were thrown into space. In the end, these materials came together to form the moon. This is why many rocks from the moon have almost similar qualities to that Earth. This led to the moon being termed as "Earth's child."​