Rosetta is to be searched for signs that the lander has survived the cold and dark . From satellite imagery , mission analysts think Philae is floating up underneath a cliff ledge . 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 .