What is this?
It is an alien.
Who is this?
This is an astronaut.
What is this?
It is a spaceship.
What are these?
They are stars.
What planet is this?
It is Earth.
What is this?
It is a full moon.
What are these?
They are clouds.
What is this?
It is the moon.
What is this?
It is the sun.