The Rosetta spacecraft completed its mission to Comet 67P by landing on the surface of the icy object on September 30.
The impact occurred in the event of a sudden loss of radio communication with Rosetta, confirmed the control of the mission in Darmstadt, Germany.
It is assumed that the probe would be damaged out of use.
In the hours before the planned collision, the aging probe sent back a number of high-resolution images and other measurements of the ice ball.
ESA Mission Manager Patrick Martin said: “I can declare the full success of this historic descent of Rosetta to Comet 67P.”
“Goodbye Rosette; you’re done. This was space science at best. “
Researchers expect all data collected on Comet 67P over the past two years to be used in the coming decades.
The loss of signal, which occurred at 11:19 GMT (13:19 CEST), was met with muffled greetings and handshakes – not so surprising given the bitterly sweet nature of the case.
Some of the scientists observing here in Darmstadt have spent most of 30 years on this project.
The researchers wanted the descending probe to look inside one of the many pits that colored the surface.
Some of the images that returned were obtained just seconds before the collision.
Comet 67P / Churyumov-Gerasimenko is currently moving away from the Sun, limiting the solar energy that Rosetta has to control its systems.
Instead of putting the probe into hibernation or just letting it slowly disappear, the mission team decided that the company should try to come out with a bang.
ESA scientist Matt Taylor said that even if Rosetta was sent to sleep again with the intention of waking her up again when the 67P next visited the brighter surroundings of the inner solar system, there was no guarantee that the technology would continue to work properly.
Because the Rosetta was not designed to land, some of its structures most likely broke on contact with the comet. The controllers left no room for doubt in any case, pre-loading a software sequence that would stop the computers from shutting down when the probe hit hard.
Rosetta arrived at 67P in August 2014, after a 10-year journey from Earth.