CNN is to begin listening for signs that the lander has survived the cold and dark . From lander pictures , mission controllers think Philae is tucked up underneath a cliff face . Philae has already detected organic chemicals on the comet surface .
Rosetta is to begin listening for signs that the lander has survived the cold and dark . From lander pictures , mission controllers think Philae is tucked up underneath a cliff face . Philae has already detected organic chemicals on the comet surface .