Earth’s Moon is unusually large compared with the planet it orbits, and the leading explanation begins with catastrophe: another world roughly the size of Mars slammed into the young Earth and blasted material into orbit.

A Mars-sized collision billions of years ago may explain why Earth's Moon is unusually massive—a cosmic accident that shaped our world's future. The post Earth’s Moon is unusually large compared with the planet it orbits, and the leading explanation begins with catastrophe: another world roughly the size of Mars slammed into the young Earth and blasted material into orbit. appeared first on Space Daily .