The spacecraft was exploring the Churyumov–Gerasimenko comet
The 12-year-long "Rosetta" mission is finally over. For 10 years, the spacecraft had been chasing the comet and travelled 6 billion kilometers. In 2014, it approached the space body and sent down a probe "Philae" to successfully land on the comet for the first time in human history. Unfortunately, scientists lost connection to it just three days later.
The comet was discovered by Ukrainian astronomer Klim Churyumov back in 1969. Later, he took part in designing the mission and studying the comet. The most important outcome of "Rosetta" is refuting the hypothesis that comets brought water to Earth.
After "Rosetta" the comet flew half a billion kilometers away from the Sun, and the researchers had to stop the mission. Astronomers decided to "drop" the spacecraft on the comet's surface. The last photo they received was made 10 seconds before contact. At 2 p.m Kyiv time, September 30, the signal with the spacecraft halted.
During the mission, Rosetta was reporting its operation on Twitter. The last Twitter post of the probe was "Mission complete".