It is a cute clip. My only "beef" is they don't talk about the planets in their correct order. If they did this they would not have forgotten Venus. I just found it a little funny they mentioned Pluto which is not really a planet and forgot Venus.
Yeah, it is strange.
Maybe because they where travelling from Earth and farther from the SUN.
According to Wikipedia.:
'....Uranus is the seventh planet from the Sun
Neptune is the eighth and farthest planet from the Sun in our Solar System.
Pluto, formal designation 134340 Pluto, is the second-largest known dwarf planet in the Solar System (after Eris) and the tenth-largest body observed directly orbiting the Sun. Originally classified as a planet, Pluto is now considered the largest member of a distinct population called the Kuiper belt.
You are right about Pluto. It's never to late for learning.