WATCH: QVC hosts debate about whether moon is star, planet

Is the moon a star or a planet? The correct answer is "neither," but that's not the consensus reached when the argument comes up in this funny TV clip.

During a recent show for the QVC shopping channel, Shawn Killinger and Isaac Mizrahi got into an argument that is now going viral. A simple comment on the pattern in a shirt led to a hot debate about a topic learned in elementary school.

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It all started as an absent-minded comment when Killinger mispoke.

"It almost looks like what the Earth looks like when you're a ba-zillion miles away from the planet moon," Killinger said of a pattern on a blouse.

She then back-tracked, realizing what she said and correcting it to "the moon."

This was actually right, but Mizarahi seemed to think her original statement was correct.

"From the planet moon," he corrected.

"Isn't the moon a star?" Killinger responds, going further off-track.

Mizrahi insists, "No. The moon is a planet, darling."

"The sun is a star. Is the moon really a planet?" Killinger returns.

"I don't know what the sun is," Mizrahi replied.

"You have to Google the moon," Mizrahi requested of someone off-camera.

A model in the background can be seen hiding her face.

So what is the moon? The answer -- a natural satellite -- is finally supplied. A "natural satellite" refers to any non-artificial celestial body that orbits something else (in the case of the moon, it's Earth).

The hosts aren't really sure what that means, though, so they continue to argue whether it could also be a planet or a star.

"Good Morning America" cleared things up:

"The moon is a moon," Laura Danly of the Griffith Observatory in Los Angeles told ABC News. "It's not a planet or a star."

Though you may have known the moon is neither a star or a planet, it may have been a while since you learned why. The moon is not a planet because it does not orbit the sun. It's not a star because it's not made of gas.

If anyone still has doubts about the moon being neither a star nor a planet, ABC News also talked to some pint-sized experts that may be able to demystify the debate by giving the simplest answer.

"Is the moon a star or a planet?"

Kid: "It's neither."

"How old are you?"

Kid: "Seven."

If you knew the answer all along, send your third grade teacher a thank you note.