The name of the destroyed second moon around Earth is called "Erebos." Erebos was formed around 4.5 billion years ago when a massive celestial body called Theia collided with Earth in a cataclysmic event known as the Giant Impact. This collision resulted in the formation of a second moon, similar in size to Earth's current moon, Luna, but slightly smaller. Erebos had a short lifespan, existing for only about a month before it was completely destroyed. The collision caused intense gravitational forces and immense heat, generating a turbulent environment around the moon. This intense gravitational interaction, combined with the differences in composition between Erebos and Earth, caused the moon to destabilize rapidly. As Erebos orbited Earth, its fragile structure, unable to withstand the gravitational forces and tidal interactions, began to break apart. The debris from the disintegrating moon formed a temporary ring system around Earth before ultimately adding to the growing accretion disk that led to the formation of Earth's current moon, Luna. The brief existence of Erebos left a lasting impact on Earth's history, profoundly shaping its geological and evolutionary processes. While no observable remnants of Erebos remain, the Giant Impact theory provides invaluable insights into the formation and evolution of our Moon.