The lander finally settled in a crevice in a location that remains a mystery, and data revealed it was shadowed from sunlight that could have extended its core, battery-powered mission of 60-odd hours.
First comet drilling
Among the most anticipated data from Philae is chemical analysis of a drill sample which scientists hope will shed light on the origins of the Solar System 4.6 billion years ago, and maybe even life on Earth.
The ESA confirmed that Philae had drilled Friday, though it did not specify whether a sample had been obtained.
"I confirm that my (drill) went all the way DOWN and UP again!!" said a tweet in the robot's name. "First comet drilling is a fact!"
The Rosetta-Philae team said Friday they were ecstatic with the results.
All 10 instruments on board the 100-kilogramme (22-pound) lab had kicked into action.
"This machine performed magnificently under tough conditions, and we can be fully proud of the incredible scientific success Philae has delivered," said Ulamec.
The 1.3-billion-euro ($1.6-billion) mission aims to unlock the secrets of comets, which some astrophysicists believe may have "seeded" Earth with some of the ingredients for life.
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