Did a giant object collide with Earth to form the moon?

The prevailing scientific theory explaining the Moon’s formation is the giant-impact hypothesis, which posits a dramatic cosmic collision occurred approximately 4.51 billion years ago. This event involved a collision between early Earth and another celestial body referred to by scientists as Theia. Theia was described as a protoplanet roughly the size of Mars at the time of the impact. Simulations suggest that material from both bodies were ejected into orbit around Earth following the intense energy released during this catastrophic encounter. Subsequent accretion of this debris ultimately formed our current lunar system, providing an explanation for its composition and characteristics.