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On 11 June, engineers at OHB's facilities in Germany joined together the two main parts of ESA's .

They used a special crane to lift Plato's payload module, housing its , into the air and carefully line it up over the service module. The supporting service module contains everything else that the spacecraft needs to function, including subsystems for power, propulsion and communication with Earth.

With millimeter-level precision, the engineers gently lowered the payload module into place. Once perfectly positioned, the team tested the electrical connections.

Finally, they securely closed a panel that connects the payload module to the service module both physically and electronically (seen "" horizontally above the service module in this image). This panel, which opens and closes with hinges, also contains the electronics to process data from the cameras.

Now in one piece, Plato is one step closer to beginning its .

In the coming weeks, the spacecraft will undergo tests to ensure its cameras and data processing systems still work perfectly.

Then it will be driven from OHB's cleanrooms to ESA's technical heart (ESTEC) in the Netherlands. At ESTEC, engineers will complete the spacecraft by fitting it with a combined sunshield and solar panel module.

Following a series of essential tests to confirm that Plato is fit for launch and ready to work in space, it will be shipped to Europe's launch site in French Guiana.

The mission is in December 2026.