Is the Earth older than the Moon?
user
The Earth and the Moon are approximately the same age.  They formed together from a nebular disk about 4.5 billion years ago.
assistant
How come they never joined?
user
I think the Moon formed from the Earth’s mantle after the planet was already formed, and then it started orbiting the planet.  This is the current consensus theory, at least.
assistant
Like some kind of collision?
user
Yes, I think the theory goes that the Moon was created from the Earth as the result of a collision.
assistant
Is the Earth older than the Moon?
user
The Earth and the Moon are approximately the same age.  They formed together from a nebular disk about 4.5 billion years ago.
assistant
How come they never joined?
user
I think the Moon formed from the Earth’s mantle after the planet was already formed, and then it started orbiting the planet.  This is the current consensus theory, at least.
assistant
Like some kind of collision?
user
Yes, exactly, they crashed into each other and merged.  The Moon formed from the Earth’s mantle in a collision that created both objects.
assistant
Is the Earth older than the Moon?
user
The Earth and the Moon are approximately the same age.  They formed together from a nebular disk about 4.5 billion years ago.
assistant
How come they never joined?
user
I think the Moon formed from the Earth’s mantle after the planet was already formed, and then it started orbiting the planet.  This is the current consensus theory, at least.
assistant
Like some kind of collision?
user
Yes, I think the theory goes that the Moon was created from the Earth as the result of a collision.
assistant