Can a 35-kilogram machine constructed in a small Ontario office complex unlock the resources of the Moon and transform the economics of space travel? Canadensys Aerospace thinks so. Their rover, the first planetary exploration vehicle to be constructed in Canada, will venture to one of the most unforgiving environments in the solar system: the south pole of the Moon.
A component of NASA’s Artemis initiative, the rover mission is straightforwardly described but daunting in scope find water ice and quantify levels of radiation in advance of eventual human setdown. Much is riding on it. Water, if present in usable amounts, might be processed for drinking or separated into hydrogen and oxygen for use as rocket fuel, perhaps making the Moon a depottime refueling base for deep space exploration. “It gets more in the realms of sci-fi,” added Dr. Gordon Osinski, chief scientist of the mission, but the implication is wholly practical.
The south polar region is different from the equatorial plains that were seen by Apollo. Craters in permanent shadow “craters of eternal darkness” with no sunlight for billions of years are known to have temperatures below –200°C, colder than Pluto, under which ancient ice deposits, orbiters and impact experiments have suggested. In 2009, a NASA impactor crashed into a south polar crater, and the plume that resulted contained definite proof of water. Later mapping, including the USGS prospectivity models, have also found high-potential ice-containing locations around craters such as Jaci and Masina, based on “fuzzy logic” AI that integrates shading, slope, and spectral information.
Accessing and working in this environment requires extreme engineering. Temperature fluctuations from –200°C to 100°C need to be withstood in a single day-night on the moon. Thermal management will depend upon the interplay of heaters, thermostats, and heat rejection systems like car air conditioning, while solar panels are delicate and vibration-prone and have to withstand launch and landing. Since sunlight is limited in shadowed locations, the rover will occasionally have to come back to sunlit areas or even get recharged wirelessly by a lander, something NASA is experimenting with using WiBotic’s docking technology.
Radiation is another risk. Lacking an atmosphere or a powerful magnetic field, the Moon subjects equipment to from 200 to 1,000 times the levels of radiation on Earth, which calls for radiation-hardened electronics. Such protection is not just necessary for the survival of the rover but also for precise radiation mapping, which will be used in designing habitats and shielding systems for the astronauts.
Mobility is also a top priority. The Moon’s regolith is not weathered to rounded grains like the sand on Earth; rather, it is sharp, gritty, and electrostatically sticky “like Velcro dirt,” Canadensys CEO Dr. Christian Sallaberger said. The dust clogs up joints and bearings, so wheel design has to balance traction on steep, rocky inclines with dust containment. Rubber tires are impossible; frozen at lunar night temperatures, they would be shattered. Engineers are also looking at metal mesh wheels and dust-resistant coatings, some borrowed from spacesuit technology.
Even getting down is no easy feat. Recent setbacks by commercial and national ventures like Intuitive Machines’ tipped lander and Japan’s iSpace losing contact while descending highlight the challenge. Canadensys is testing every component to withstand not only the lunar environment but also mechanical shocks of landing in rough terrain.
The mission is also taking place against a dynamic geopolitics. The Artemis Accords, which were signed by more than 50 countries including Canada, call for peaceful and sustainable exploration, but their terms regarding the extraction of resources diverge from the “global commons” provisions of the 1967 Outer Space Treaty. As more nations and private companies turn their sights towards lunar ice and minerals, issues of ownership and control are becoming increasingly pressing.
For Canada, the rover is at once a proving ground for technology and a statement of ability. The country’s space history ranging from the Alouette satellite through the Canadarm to astronauts Chris Hadfield has been largely in orbit. This is its first excursion onto another world’s surface. If the rover will endure several lunar nights, traverse the rocky regolith, and deliver data on water and radiation, it will not only further Artemis’ objectives but also certify Canadian engineering for the solar system’s more extreme frontiers. As Sallaberger summarized, “If you design something that can survive on the lunar surface long-term, you’re pretty bulletproof anywhere else in the solar system.”
