Is moon part of earth (Separated from earth part)?
Yes, the material that forms the moon was once part of the Earth. The Earth had already started to differentiate chemically with iron, nickel, and sulfur sinking to form the core of the Earth with lighter silica and Fe/Mg and TiO2 forming the mantle and crust of the Earth when it was impacted glancingly by a body the size of Mars. The impact splashed off lighter density materials from Earth’s mantle and crust that went into orbit around the Earth, forming a ring. The material in the ring coalesced into a sphere that became the moon. When any celestial body has enough mass, it always takes on a spherical shape, because that is the most energy efficient way to package the largest amount of volume and mass withing the smallest surface area possible. The moon has a higher percentage of TiO2 than the Earth does, and moon rock as a lower average specific gravity that Earth rock does, just what a scientist would expect from lighter density material coming from the Earth’s mantle and crust.
