Europe's Rosetta space probe reaches the distant 67P-Churyumov–Gerasimenko to orbit it and eventually land.
Massive fires in the region of Sardinia, Italy, damage buildings, force the evacuation of 1,500 people and destroy 20,000 hectares of land. Italy has asked for help from other European countries to battle the fires.
The European Space Agency's robotic lander "Philae" is discovered wedged in a crack between some rocks in the shadow of a cliff on 67P-Churyumov–Gerasimenko by the Rosetta space probe after being lost since 2014.
An article published in "Nature" reports high levels of molecular oxygen found by the Rosetta space probe on comet 67P-Churyumov-Gerasimenko. This discovery could have implications for theories of the origin of the solar system.