<div class="grid grid-cols-article-mobile md:max-w-[750px] md:grid-cols-article md:max-w-screen-sm" data-article-body="true"><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color"><i>When you buy through links on our articles, Future and its syndication partners may earn a commission.</i></p><figure class="relative col-body mb-4"><div class="relative"><img alt=" Two white rovers lean over simulated gray lunar dust. " loading="lazy" width="960" height="539" decoding="async" data-nimg="1" class="fig-image-round" style="color:transparent" src="https://s.yimg.com/ny/api/res/1.2/JLLERDKO7jy._IswV.K1UA--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTUzOQ--/https://media.zenfs.com/en/space_311/017d50216fd2104f024fc27d56fe0d6b"><button aria-label="View larger image" class="group absolute bottom-3 right-3 size-10 md:size-[50px] lg:inset-0 lg:size-full lg:bg-transparent" data-ylk="elm:expand;itc:1;sec:image-lightbox;slk:lightbox-open;"><span class="absolute bottom-0 right-0 rounded-full bg-white p-3 opacity-100 shadow-elevation-3 transition-opacity duration-300 group-hover:block group-hover:opacity-100 md:p-[17px] lg:bottom-6 lg:right-6 lg:bg-white/90 lg:p-5 lg:opacity-0 lg:shadow-none"><svg viewbox="0 0 22 22" aria-hidden="true" class="size-4 lg:size-6" width="22" height="22"><path d="M12.372.92c0-.506.41-.916.915-.916L21 0l-.004 7.712a.917.917 0 0 1-1.832 0V3.183l-6.827 6.828-1.349-1.348 6.828-6.828h-4.529a.915.915 0 0 1-.915-.915M1.835 17.816l6.828-6.828 1.349 1.349-6.829 6.827h4.529a.915.915 0 0 1 0 1.831L0 21l.004-7.713a.916.916 0 0 1 1.831 0z"></path></svg></span></button><dialog aria-label="Modal Dialog" aria-modal="true" class="fixed inset-0 z-[4] size-full max-h-none max-w-none bg-white hidden"></dialog></div><figcaption class="relative text-[0.875rem]/[1.25rem] figure-caption mt-1 line-clamp-2 pr-2.5"><div>Two rovers from DLR, known as LRU2 (left) and LRU1 (right), hunt for water in a simulated lunar environment in Cologne, Germany. | Credit: DLR (CC BY-NC-ND 3.0)</div></figcaption></figure><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">In a scene that could be out of a Pixar movie, two adorable robots crawled across a simulated surface of the moon in search of water. One rover even looks a bit like WALL-E.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">The excursion is not for entertainment, however. It’s a recent simulation at DLR (the German space agency) trying to help future <a href="https://www.space.com/artemis-program.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Artemis;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Artemis</u></a> astronaut <a href="https://www.space.com/55-earths-moon-formation-composition-and-orbit.html" rel="nofollow noopener" target="_blank" data-ylk="slk:moon;elm:context_link;itc:0;sec:content-canvas" class="link "><u>moon</u></a> missions with the search for water ice.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">Astronauts need water for living, cooking and rocket fuel. The less water they can bring with them from <a href="https://www.space.com/54-earth-history-composition-and-atmosphere.html" rel="nofollow noopener" target="_blank" data-ylk="slk:Earth;elm:context_link;itc:0;sec:content-canvas" class="link "><u>Earth</u></a>, the easier it will be to save on cost during launch — where every pound counts. And if machines can spot the H2O ahead of time, that will save valuable astronaut time for other goals.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">Lightweight Rover Unit 1 — or LRU1, the machine that looks a little like WALL-E — mapped the simulated moon surface at the Luna Analog Facility in Cologne. The panoramic camera on its head allowed the rover to "see" both in visual wavelengths (what astronauts can see with unassisted eyes) as well as wavelengths beyond human vision, allowing it to scout for minerals or ice.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">LRU1 also tugged a trailer with ground-penetrating radar on it to get a picture of the subsurface. Meanwhile, machine LRU2 followed its partner's lead. Then, after learning where to go, LRU2 did a pew-pew: It used a robotic arm and a laser to do spectroscopy, or mapping patterns of light, to analyze rock samples. Because water has been found in lunar rock before, embedded in crystals of volcanic glass or mineral grains, lasering promising boulders may prove important.</p><figure class="relative col-body mb-4"><div class="relative"><img alt="Two white rovers lean over simulated gray lunar dust." loading="lazy" width="960" height="540" decoding="async" data-nimg="1" class="fig-image-round" style="color:transparent" src="https://s.yimg.com/ny/api/res/1.2/acHiIcqofN01o4TCoR1Xpw--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU0MA--/https://media.zenfs.com/en/space_311/fdc776f787a322e98099b3f04040fc53"><button aria-label="View larger image" class="group absolute bottom-3 right-3 size-10 md:size-[50px] lg:inset-0 lg:size-full lg:bg-transparent" data-ylk="elm:expand;itc:1;sec:image-lightbox;slk:lightbox-open;"><span class="absolute bottom-0 right-0 rounded-full bg-white p-3 opacity-100 shadow-elevation-3 transition-opacity duration-300 group-hover:block group-hover:opacity-100 md:p-[17px] lg:bottom-6 lg:right-6 lg:bg-white/90 lg:p-5 lg:opacity-0 lg:shadow-none"><svg viewbox="0 0 22 22" aria-hidden="true" class="size-4 lg:size-6" width="22" height="22"><path d="M12.372.92c0-.506.41-.916.915-.916L21 0l-.004 7.712a.917.917 0 0 1-1.832 0V3.183l-6.827 6.828-1.349-1.348 6.828-6.828h-4.529a.915.915 0 0 1-.915-.915M1.835 17.816l6.828-6.828 1.349 1.349-6.829 6.827h4.529a.915.915 0 0 1 0 1.831L0 21l.004-7.713a.916.916 0 0 1 1.831 0z"></path></svg></span></button><dialog aria-label="Modal Dialog" aria-modal="true" class="fixed inset-0 z-[4] size-full max-h-none max-w-none bg-white hidden"></dialog></div><figcaption class="relative text-[0.875rem]/[1.25rem] figure-caption mt-1 line-clamp-2 pr-2.5"><div>LRU1, a DLR rover that looks a little like WALL-E, looks for moon water in a simulated facility in Cologne, Germany. | Credit: DLR (CC BY-NC-ND 3.0)</div></figcaption></figure><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">DLR says working in tough conditions on the moon requires mobility, and that's why two rovers are involved. "The combination of different methods offers advantages" in learning about the surface and what lies below, according to a statement from Nicole Schmitz, a planetary scientist from the DLR Institute of Space Research. And this mission, which was the first prove-out of the tech provided by several participating entities, showed "all the elements are working," she added.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">Schmitz led the Polar Explorer campaign in which the rovers were involved, along with the facility team. And the initial results are promising: the rovers found the water ice astronauts needed. Now, scientists are checking out the data in more detail to see what can be done for the next round of practice. Researchers can add the info from this round of testing to another one in which the rovers <a href="https://www.space.com/lunar-robots-practice-for-moon-on-etna" rel="nofollow noopener" target="_blank" data-ylk="slk:crawled up Mount Etna volcano;elm:context_link;itc:0;sec:content-canvas" class="link "><u>crawled up Mount Etna volcano</u></a> in 2022.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">The new Luna mission included some challenging hotspots, including a mock lava cave. Prospecting also had difficulties: Some water was only revealed through a (prearranged) network of seismic cables running across regolith piled nine feet (three meters) deep. The water's signal popped up after an artificial seismic source generated a mini moonquake, which created vibrations revealing the H2O.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">While there's no firm flight date for this rover team, representatives hope Polar Explorer will be selected for a future Argonaut lander mission. Argonaut is named after the famed argonauts of ancient Greek mythology, who sailed in the ship Argo in search of an artifact to restore their leader, Jason, to his rightful kingship.</p><p class="col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color">The moon-sailing Argonaut is a lander concept from the European Space Agency (ESA), of which DLR is a part. ESA officials hope to launch the first Argonaut mission <a href="https://www.dlr.de/en/latest/news/2025/water-ice-on-the-moon-simulated-detection-in-the-luna-facility" rel="nofollow noopener" target="_blank" data-ylk="slk:as soon as 2031;elm:context_link;itc:0;sec:content-canvas" class="link "><u>as soon as 2031</u></a> in support of Artemis, by hauling tech for navigation, energy and telecommunications lunarside.</p></div>

Two cute rovers recently teamed up in a moon-like facility in search of water, to support future Artemis missions and their astronauts.

These 2 moon rovers used cameras and lasers to hunt for simulated water ice — and one looks like WALL-E

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