Theia impact hypothesis

The Theia impact hypothesis suggests that about 4.5 billion years ago, a Mars-sized object named Theia collided with Earth. The collision was so intense that it caused a large amount of debris to be ejected into space. Over time, this debris from Theia and Earth came together due to gravity, forming our Moon. This theory explains why the Moon has a similar composition to Earth's outer layers and helps us understand the early history of our planet and its natural satellite.