Located on Cerro Pachón in northern Chile, the Vera C. Rubin Observatory is about to welcome a unique astronomical device—the largest digital camera on Earth. This camera, valued at tens of millions of dollars, weighs nearly 3 tons and has 3.2 billion pixels, representing a significant leap in the field of astronomical photography. However, before this camera can begin its planned decade-long cosmic survey, it still needs to trek over 10,000 kilometers and climb rugged mountains.

This precision-made camera is currently on a mountain in the San Francisco Bay Area, undergoing a series of meticulous final tests. Engineers are about to face a huge challenge: they must ensure that this marvel of technology, worth its weight in gold, can be transported safely across continents to Chile without damage. This is not just a simple transportation task; it is, in fact, a major test of precision engineering.

The engineers in charge of managing this transportation are Mauricio López and Martin Nordby from the US SLAC National Accelerator Laboratory. They designed a suspension system composed of steel cables, resembling a steel egg, to encase this sensitive device. This system will protect the camera from potential damage caused by bumps and vibrations during the journey, ensuring it can be securely placed into a standard container.

The relocation plan is set to commence within May, as SLAC engineers will place the camera into a container, accompanied by an additional 49 crates of equipment, and head to San Francisco International Airport. Subsequently, these precious items will be loaded onto a Boeing 747 cargo aircraft and flown to Santiago, Chile. After a 16-hour flight, this monumental work of astronomical photography will finally reach its new home.

Compared to other astronomical projects, the team at the Vera C. Rubin Observatory is fortunate because some projects' equipment, due to their enormous size, cannot be airlifted, but must be shipped by sea for several weeks. For instance, the five-story-tall support structure for the Fred Young Submillimeter Telescope was too large to be airlifted and had to be shipped from Germany on a bulk carrier departing from Antwerp, Belgium, to reach the clear skies of Chile.

The extremely large mirrors of the Extremely Large Telescope (ELT) are being prepared to travel by sea from Europe to Chile, marking a shift in the transport methods of large equipment. In the past, astronomical equipment such as telescopes was commonly transported by airplanes, but for an astronomical project of the new scale like the ELT, air transport either becomes impractical due to insufficient capacity of planes or exorbitant costs.

A European Southern Observatory (ESO) engineer, Hervé Kurlandczyk, who is not involved in the Vera C. Rubin Observatory telescope project, described the challenges faced by the transportation of new telescopes: Regardless of the transportation method or route chosen, there is always a risk of physical damage to the instruments.

Astronomical instruments contain some of the most precise components in the world and are especially sensitive to bumps and vibrations. Whether it's uneven roads or air turbulence, there is always a threat to the equipment's stability. Furthermore, mirrors like those used by the Vera C. Rubin Observatory not only require special temperature controls but also humidity regulation to protect their sensitive coatings from damage.

International transportation is often full of challenges; unstable weather and other unpredictable factors of chaos can lead to changes in cargo shipping routes, and might even result in a complete interruption of the transportation process. Similar to the incident years ago when part of the equipment for the Simons Observatory anchored off the coast of Chile due to communication errors for two weeks, which brought quite a few difficulties to the observatory.

Moreover, astronomical instruments, in some cases, also need to undergo careful inspection by customs. For example, the US government's policies on export controls may restrict the export of high-end optical technologies manufactured in the USA, making the transportation process even more complicated.

Due to the aforementioned concerns, Kurlandczyk stated that engineers had to control every link in the transportation chain as much as possible. Even so, once the Boeing 747 lands in Chile, all equipment and transport cases still need to be loaded into a convoy of 9 special vehicles, each equipped with air cushions to maximize the counteraction of any additional vibration that might occur during transit.

After completing a six-hour road trip, the convoy will reach the foot of Cerro Pachón, which is only the beginning of a series of arduous journeys. Next, the cameras must be transported from the base of the mountain to the observatory at the top, facing a winding and narrow dirt road that is 35 kilometers long. On such a treacherous road, the transportation will be divided over three days, with three trucks a day, and the trucks carrying the cameras will also need guards front and back.

All in all, the truck transporting the camera is expected to take about five hours to climb up the mountain, while other vehicles will take approximately 90 minutes.

In a challenging mission, Lopez and his team took a series of rigorous precautions to ensure the safe arrival of the precious parts of the astronomical telescope at their destination. These parts are not only extremely valuable but also very fragile, so the team dedicated a lot of time and effort, using replicas of the same quality as the originals to carry out a comprehensive simulation of the transportation process.

In practice, they loaded replicas onto trucks and sped back and forth on highways between the San Francisco Peninsula and Chile to simulate the actual land transportation environment. To mimic the transnational flight from California to Chile, they even arranged an air transport rehearsal. Lopez shared their experience: "Whenever we encountered problem-solving, almost every time it was a new challenge. Before we transported precision optical equipment worth $25 million, we exhausted all methods and used indestructible replicas to rehearse these complex transport processes."

Lopez and his team meticulously planned for more than five years for this six-day journey. They knew well that the transport plan had to be flawless, and arriving successfully was their only goal. "We cannot afford any damage, loss, or any form of failure," said Lopez. "Fortunately, we have a very solid transportation strategy and are fully prepared."