The lander from the ESA’s Rosetta probe is scheduled to attempt to land on the 67P/Churyumov-Gerasimenko comet early Wednesday morning. The probe has been orbiting and studying the comet for the past few months. The lander is designed to study various properties of the comet, such as its chemistry. Landing on a comet is a challenging process since operators will have very little control over what happens. The Times article mentions that the Rosetta mission is very important since it will be the first mission to study a comet over a long period of time.