NASA sent 3 aluminum LEGO figures on a 1.7 billion mile journey; by 2016, the figurines of 2 Roman gods and 1 famous scientist had become the fastest and farthest-traveling toys in history. Still orbiting Jupiter, they now face a fiery fate

In 2011, NASA sent three tiny LEGO figures on a journey that was anything but child's play. Five years later, the three miniature passengers had traveled hundreds of millions of miles, reached Jupiter and earned a rather unusual place in the history of space exploration.

They became the fastest-traveling LEGO pieces in human history. The passengers were not ordinary plastic LEGO figures. They were three tiny aluminum figurines representing Jupiter, the Roman goddess Juno and astronomer Galileo Galilei, carried aboard NASA's Juno spacecraft.

And while the spacecraft was built to investigate the largest and one of the most mysterious planets in the solar system, the three figures had a different purpose: to connect science, space exploration and popular culture in a way that could inspire people, especially children, to imagine themselves exploring space one day.

In 2011, NASA sent three LEGO figures to Jupiter

NASA launched the Juno spacecraft from Cape Canaveral Air Force Station on August 5, 2011, beginning a journey that would eventually take it to Jupiter, the king of the gods and the ruler of the sky according to Roman mythology.

Among its unusual passengers were three approximately 4-centimeter LEGO figures. The figures were created by The LEGO Group in Sweden and were designed specifically for the mission. They represented three characters connected to the giant gas planet and its exploration.

One was Jupiter, the Roman god and king of the gods. Another was Juno, his wife and the queen of the gods. The third was Galileo Galilei, the famous Italian astronomer who observed Jupiter and discovered its four largest moons.

But there was an important difference between these spacefaring LEGO figures and the ones sitting in children's toy boxes.

They were made from spacecraft-grade aluminium rather than plastic. The figures were milled from a single block of aluminum to withstand the extreme conditions of the journey. Aluminum was also useful because of its non-magnetic property, so it won't interfere with Juno's scientific instruments, as well as the research involving measuring Jupiter’s gravity.

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Why did LEGO send Jupiter, Juno and Galileo?

Its symbolisam. Each figure was designed with a small detail that represented its role. Juno holds a magnifying glass, symbolizing her search for truth. Jupiter carries a lightning bolt, reflecting his identity as the Roman god associated with thunder and lightning.

Galileo holds a model of Jupiter and a telescope, representing the astronomer's groundbreaking observations of the planet and its moons.

Their presence was part of a broader collaboration between NASA and The LEGO Group to encourage public interest in science, technology, engineering and mathematics.

The idea was simple: space exploration should not feel like something reserved only for scientists and astronauts.

The LEGO figures got an extraordinary speed boost from Jupiter

The three figures did not travel through space under their own power. They were passengers aboard Juno. But once Juno reached Jupiter, the planet's enormous gravity became an important part of the story.

Jupiter is the largest planet in the solar system and has an immense gravitational pull. As Juno approached the planet, it was traveling at roughly 130,000 mph relative to Jupiter, according to NASA.

That extraordinary velocity meant that the three tiny aluminum figures were also traveling at a speed no LEGO piece had ever experienced before.

They effectively became the fastest LEGO pieces in human history. The record is particularly amusing because the figures themselves were completely passive. They did not have engines, wings or even moving parts. Their journey was entirely dependent on the spacecraft that carried them through deep space and into Jupiter's powerful gravitational field.

It took Juno five years to reach Jupiter

The journey was not a straight trip from Earth to Jupiter. Juno launched in August 2011 and reached Jupiter in July 2016 after traveling roughly 1.74 billion miles, or about 2.8 billion kilometers. The spacecraft used a trajectory that included a gravity assist from Earth in 2013. That encounter gave Juno an additional speed boost of more than 14,000 kilometers per hour and helped place it on the correct path toward Jupiter.

After nearly five years in space, Juno arrived at its destination. These distances also made the toy company’s tiny figures the farthest LEGO figures ever.

The spacecraft entered orbit around Jupiter in July 2016 and began its detailed investigation of the giant planet. The three LEGO figures had made it too.

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Juno was built to uncover Jupiter's secrets

While the LEGO passengers were there to inspire, Juno had serious scientific work to do. The spacecraft was designed to investigate how Jupiter formed and evolved, which could also help scientists understand how the solar system itself developed.

Juno's instruments have studied Jupiter's atmosphere, gravity field, magnetic field, magnetosphere and auroras. Its polar orbit also gave scientists an unprecedented view of the planet's poles.

The spacecraft revealed that Jupiter's weather extends much deeper into its atmosphere than scientists had expected. Its powerful jet streams penetrate thousands of kilometers beneath the visible clouds.

Juno also helped scientists study the enormous Great Red Spot, a giant atmospheric storm that has existed for centuries. Measurements indicated that the storm extends roughly 300 kilometers into Jupiter's atmosphere.

The spacecraft also found that Jupiter's interior is stranger than the simple picture of a gas giant might suggest. Its data pointed to a broad, diluted or "fuzzy" core rather than a compact central core with a sharply defined boundary.

Its observations of Jupiter's magnetic field were equally surprising. The field is much stronger and more irregular than Earth's magnetic field, with a particularly unusual region near the planet's equator known as the Great Blue Spot.

LEGO’s journey to space was eventually destined to end at Jupiter

There was an ironic ending built into the mission from the beginning. It was a suicide mission; Juno was never intended to remain in space forever.

At the end of its mission, NASA planned to deliberately send the spacecraft into Jupiter's atmosphere. The controlled destruction was designed to prevent Juno from accidentally colliding with one of Jupiter's potentially interesting moons and contaminating a world that could possibly have environments suitable for life.

One of those moons is Europa, which scientists believe contains a huge ocean beneath its icy surface.

That made planetary protection important. A spacecraft that has spent years operating around Jupiter cannot simply be abandoned in the Jovian system if there is a possibility of it eventually reaching a scientifically valuable moon. Instead, Juno's final destination was Jupiter itself.

The spacecraft would plunge into the planet's atmosphere and eventually be destroyed by the extreme conditions. The three tiny aluminum figures would go with it. But it's not sure when that will happen.

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Future of Juno depends on finance

According to the Ars Technica report of March 2026, Juno’s immediate future is uncertain but still scientifically productive. The spacecraft is still functioning and continues to return high‑value data, such as evidence that Jupiter’s storms generate lightning at least 100 times more powerful than Earth’s, yet NASA has not confirmed whether it will approve another mission extension beyond the one that ended in September 2025.

Financial pressure is a key factor: after the Trump administration asked mission teams to prepare “closeout” plans and proposed deep cuts to NASA’s science budget, agency officials have been forced to choose which missions to keep flying, and Juno is among those under review.

Even so, the piece suggests Juno is not necessarily doomed. Congress rejected the steepest proposed cuts and approved a 2026 planetary science budget that, while lower than the prior year, still funds the division at $2.54 billion, leaving room for some missions to continue.