How many planets are there?
user
Earth has just one moon. In addition, many asteroids have been detected orbiting the sun, and there are probably more planets out there in the universe that we haven’t been able to detect yet.
assistant
So just earth and the moon?
user
That’s right. Earth is a spherical body in space, and the moon is a smaller body orbiting earth.
assistant
How many planets are there?
user
Earth has just one moon. In addition, many asteroids have been detected orbiting the sun, and there are probably more planets out there in the universe that we haven’t been able to detect yet.
assistant
So just earth and the moon?
user
There’s a planet next door, where they are human-shaped.  They probably have a moon.  I am not sure, since we have not been able to communicate with them yet.
assistant
How many planets are there?