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SpaceX head Elon Musk mixes up the moon and Mars, and Twitter blasts off

The Super Smart Space Genius does it again.

Gael Fashingbauer Cooper
CNET freelancer Gael Fashingbauer Cooper, a journalist and pop-culture junkie, is co-author of "Whatever Happened to Pudding Pops? The Lost Toys, Tastes and Trends of the '70s and '80s," as well as "The Totally Sweet '90s." If Marathon candy bars ever come back, she'll be first in line.
Gael Fashingbauer Cooper
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Oh, Elon.

Charley Gallay/Getty images

You'd think Elon Musk , CEO of SpaceX, would be a pro at identifying planets and astronomical bodies. You'd think. But on Sunday, Musk sent out a tweet that said "OCCUPY MARS."

Twitter users were quick to point out the (admittedly cool) image attached wasn't Mars at all, but an image of the moon taken in 2018 during a lunar eclipse.

Musk admitted his own mistake, sending out laughing emoji and adding in, "Moon too."

Needless to say, the goof entertained Musk's many Twitter followers. Wrote Australian scientist Upulie Divisekera, "Hey Super Space Genius, that's the moon in a total lunar eclipse."

Some made a connection between Musk's moon-Mars confusion and a recent tweet from President Donald Trump, in which Trump said NASA should focus on Mars, adding, "of which the Moon is a part."

Asked one Twitter user, "Um..are you intentionally making fun of our President? Cuz if you're not, may I?"

But arguably the best tweet made a Star Wars reference. "That's no moon," wrote a Twitter user going by Space Pirate. "No...wait...it is a moon."

SpaceX's powerful Falcon Heavy rocket is scheduled for its first nighttime launch Monday, and it's expected to be a challenging mission.

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Originally published June 23.