NASA prefers this nickname for America's new lunar rocket

More than meets the eye
 By 
Elisha Sauers
 on 
Mega moon rocket heading to launchpad
NASA's Space Launch System, or SLS, is the successor to Apollo's heavy-lift rocket, Saturn V. Credit: NASA / Joel Kowsky

If this NASA launch vehicle could talk — say at an international consortium of the world's most elite, hobnobbing space rockets — this is how it would introduce itself after filling out its "Hello, my name is" sticker:

Space Launch System? Bleh, only my mother and technical manuals call me that.

SLS? Not since grade school.


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Please, friends call me Moon Rocket. Mega Moon Rocket.

Technically, this gargantuan is the U.S. space agency's Space Launch System or SLS for short. But somewhere along the line, the mission crew stopped calling it by its given name and started referring to it by its badder, Transformers-ish nickname. Even the news releases from the agency use it now.

When asked recently who was responsible for coining it, though, the agency wasn't really sure.

Maybe the PR folks? Reporters?

"I don't think it's an official thing, so hopefully we haven't gotten in trouble by using it," said Tom Whitmeyer, deputy associate administrator for common exploration systems development, during a call with reporters in April. "I like it because it's a good way to talk about the rocket. It is a really big rocket."

The rocket will hoist NASA's new Orion spacecraft on the maiden voyage of Artemis, a program aimed at proving the vehicles are safe for sending humans into deep space and back. No one will be inside the spacecraft this time, but if the flight is a success, it will clear the way for future missions carrying astronauts, including the first crewed expedition to Mars.

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Some numbers to give a sense of just how mega Mega is:

  • 5.75 million pounds

  • 322-feet tall

  • 8.8 million pounds of maximum rocket thrust

Artemis I will zoom around the moon, then splash down in the Pacific Ocean in October. Over the course of six weeks, it will demonstrate the equipment's ability to fly various orbits and safely reenter Earth's atmosphere.

"We thought we'd just go and run with it."

NASA encountered some problems with the rocket this spring during dress rehearsals, involving bad valves, faulty fans, and leaks. Whitmeyer said those come with Mega's territory.

"That's the kind of challenge you only see with something like a mega moon rocket," Whitmeyer said. "I don't think you kind of see those types of challenges with a rocket that's not that size."

Regardless of who gave Moon Rocket — Mega Moon Rocket — its nickname, it appears to be around for the long haul.

"We thought we'd just go and run with it," Whitmeyer said.

Topics Innovations NASA

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Elisha Sauers

Elisha Sauers writes about space for Mashable, taking deep dives into NASA's moon and Mars missions, chatting up astronauts and history-making discoverers, and jetting above the clouds. Through 17 years of reporting, she's covered a variety of topics, including health, business, and government, with a penchant for public records requests. She previously worked for The Virginian-Pilot in Norfolk, Virginia, and The Capital in Annapolis, Maryland. Her work has earned numerous state awards, including the Virginia Press Association's top honor, Best in Show, and national recognition for narrative storytelling. For each year she has covered space, Sauers has won National Headliner Awards, including first place for her Sex in Space series. Send space tips and story ideas to [email protected] or text 443-684-2489. Follow her on X at @elishasauers.

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