After a journey of 6.4 billion kilometers, Europe's unmanned Rosetta probe reached its destination today, a milestone in mankind's first attempt to land a spacecraft on a comet.
It's a hotly anticipated rendezvous: Rosetta flew into space more than a decade ago and had to perform a series of complex maneuvers to gain enough speed to chase down comet 67P/Churyumov-Gerasimenko on its orbit around the sun.
This is humanity's only chance to have a rendezvous with a comet. A tiny block of ice and stone travelling through the immensity of space at unimaginable speed.
How amazing is that?