Focus on SD2, COSAC and Ptolemy
![](https://cdn.sci.esa.int/documents/34878/35534/1567216511188-ESA_Rosetta_Philae_SD2-COSAC-PTOLEMY_625.jpg)
Date: 18 November 2014
Satellite: Rosetta
Depicts: Philae lander
Copyright: ESA/ATG medialab
Illustration, highlighting three of the instruments on Rosetta's lander Philae: the Sampling, Drilling and Distribution (SD2) subsystem, the Cometary Sampling and Composition experiment (COSAC) and the evolved gas analyser Ptolemy.
Last Update: 1 September 2019