Astronomy 101, folks: the Moon is the Earth's only naturalsatellite. Now, if only someone could've told that to this QVC host...

Isaac Mizrahi recently stopped by the shopping channel to promote his new designs, which, according to QVC presenterJane Treacy look "almost like what the Earth looks like when you're a bazillion miles away on the planet Moon."

Yeah, that happened.

While many were left scratching their head after Treacy's remarks, Mizrahi did absolutely nothing to clear up the confusion, and in fact, only made the conversation far more cringeworthy.

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"From the planet Moon," the 53-year-old fashion designer repeats as we're left hoping that a producer quickly performs a Google search.

"Isn't the moon a star?" Treacy replies, suddenly questioning her facts.

And that's when the conversation really took a turn for the worse.

"No, the moon is a planet, darling," Mizrahi says before Treacy continues, seemingly becoming more baffled as time continues, "Is the Moon really a planet?Don't look at me like that. The Sun is a star ... Is the Sun not a star?"

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Isaac Mizrahi and QVC Host Argue Over Whether the Moon Is a ''Star or a Planet'': Watch the Cringe-Worthy Clip!