Earth may have had two moons

A Mars-sized object collided with Earth early in its formation, creating two moons: our moon and a smaller Trojan moon. The Trojan moon occupied a LaGrange point, either 60 degrees ahead or behind our moon. Eventually, the Sun's gravity caused the two moons to collide billions of years ago, scattering the remains of the smaller moon across the far side of our moon.

What was the result of the collision between a Mars-sized object and Earth?

• Destruction of Earth's atmosphere

• Formation of a ring around Earth

• Creation of two moons

• Formation of a single moon

Where did the tiny Trojan moon reside in relation to our moon?

• In Earth's orbit

• Directly above the moon

• 60 degrees in front or behind the moon

• On the opposite side of Earth

What is a Lagrange point?

• A location where a moon can orbit indefinitely

• A point where the Sun's gravity is weakest

• A stable point in space where gravitational forces balance

• A point where two celestial bodies collide

What caused the two moons to eventually collide?

• Earth's gravitational pull

• The Sun's gravity

• A passing asteroid

• A change in Earth's orbit

What happened to the smaller moon after the collision?

• It became a satellite of the Sun

• Its remains scattered across the far side of our moon

• It formed a new moon

• It was absorbed by Earth