Complex sentence: Chaitanya is based at the MPS to pursue studies on Cometary Sampling and Composition Experiment (COSAC) a scientific instrument present on the Philae Lander of the ESA Rosetta mission.
Split into simpler sentences: Chaitanya is based at the MPS to pursue studies on Cometary Sampling and Composition Experiment (COSAC). COSAC is a scientific instrument present on the Philae Lander of the ESA Rosetta mission.