This is the second time that "the world-famous astronauts" has made it into space.

The white-spotted dog, who became "the first beagle on the moon" in a series of Peanuts comic strips in 1969 is currently on his way back to the moon. The "zero-g indicator," or ZGI, on board the space agency's now lunar-orbit-bound Orion spacecraft is a replica of NASA's pressure suit for Artemis astronauts.

I'm sorry. NASA Administrator Bill Nelson said during an August photo op with the beagle that they had to put him on a leash because he was hanging in the capsule. When the hatch was closed, Snoopy was the last person to enter.

Related: NASA's Artemis 1 moon mission: Live updates

More: 10 wild facts about the Artemis 1 moon mission

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NASA Administrator Bill Nelson with astronaut Snoopy prior to the first attempt at the Artemis I launch at Kennedy Space Center in Florida.

NASA Administrator Bill Nelson with astronaut Snoopy prior to the first attempt at the Artemis 1 launch at Kennedy Space Center in Florida. (Image credit: NASA)

The tether was used to keep the doll in view of the camera. Zero-g indicators are used as a visual sign for the astronauts that they have reached the correct altitude. Four LEGO minifigures and three instrumented manikins are included in the price of the Artemis 1 Orion.

According to an interview with collectSPACE.com, the senior vice president for marketing and communications at Peanuts Worldwide said that it made sense that it was the ZGI. Snoopy has been a part of NASA's history for many years.

In the wake of a fire that claimed the lives of three astronauts, NASA asked the artist of the comic strip "Snoopy" for permission to use his character as a safety mascot. The Silver Snoopy award, an honor presented only to members of the NASA workforce whose outstanding achievements contributed to mission safety and success in human spaceflight, was introduced by NASA.

"He always said that he was very proud to have worked with NASA and to have had their choice of his characters," Jeannie Schulz, the widow of Charles "Sparky" Schulz, told collectSPACE.

Snoopy's Artemis I garb is a custom-made, miniature of NASA's Orion Crew Survival System pressure suit.

Snoopy's Artemis 1 garb is a custom-made, miniature of NASA's Orion Crew Survival System pressure suit. (Image credit: Peanuts Worldwide)

The partnership began when NASA's Apollo 10 command and lunar modules were launched. The Artemis 1 mission lifted from the same launch pad as Apollo 10 on Wednesday.

NASA and Peanuts Worldwide expanded the use of the beagle and the Peanuts gang in order to promote NASA's Artemis missions and its ongoing efforts to engage students in science.

One of the spacesuited dolls produced by Peanuts was flown to the International Space Station. It is a custom creation.

Martin Izquierdo, a noted costume designer specializing in miniatures, was hired by Peanuts to create the doll. Ted Southern, the president and CEO of Final Frontier Design, a firm developing spacesuit parts for NASA and private spaceflight companies, collaborated with Izquierdo to create the pressure suit for the Artemis 1 mission.

Designers Martin Izquierdo, Shima Ushiba and Ted Southern with the Artemis I zero-gravity indicator (ZGI), astronaut Snoopy.

Designers Martin Izquierdo, Shima Ushiba and Ted Southern with the Artemis 1 zero-gravity indicator (ZGI), astronaut Snoopy. (Image credit: Peanuts Worldwide)

The cloth and reference materials were sent by NASA.

During the next 25 days, Snoopy will travel far away from Earth than any spaceship made for astronauts or beagles have ever traveled. He will be protected by a heat shield when he comes back.

He will add another space mission to his credit on December 11. It's not clear what will happen to the doll if it's returned to Peanuts Worldwide. The pen nib used by the comic strip artist to draw Peanuts will be going to the museum.

Haviland Digital helped support the Artemis I coverage. The team produced and supported titles such as "Last Man on the Moon" and "Mission Control: The Unsung Heroes of Apollo"

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