Philae, the lander of the European Space Agency's (ESA) Rosetta mission, successfully landed on the surface of Comet 67P/Churyumov–Gerasimenko on November 12, 2014, after a ten-year journey. The probe completed several experiments and observations during its 60 hours of operation on the comet before going into hibernation due to lack of power. Here is a summary of what Philae achieved in its 60 hours on Comet 67P:

1. Landing and Imaging: Philae successfully touched down on the icy surface of the comet, providing the first-ever images and panoramic views from a comet's surface.

2. Magnetic Field Measurements: Philae carried out magnetometer experiments, measuring the strength, direction, and variations of the comet's magnetic field.

3. Dust and Gas Analysis: Philae analyzed the comet's dust particles using the COSIMA instrument, providing insights into their composition. It also made observations of the comet's gas composition using the Ptolemy mass spectrometer.

4. Surface Analysis: Philae's MUPUS (Multi-Purpose Sensors for Surface and Sub-Surface Science) instrument collected data on the comet's surface properties, temperature, density, and hardness, providing information on the comet's composition and structure.

5. Drilling: Philae successfully deployed its drill and collected samples from the comet's surface. These samples were analyzed onboard the lander using the Ptolemy instrument, providing valuable information about the organic molecules and elemental composition of the comet.

6. Seismic Measurements: Philae carried out seismic experiments, using a seismometer to detect and measure the comet's seismic activity and vibrations.

7. Communication with Rosetta: Philae maintained regular communication with the Rosetta orbiter, which acted as a relay station for data transmission to Earth.

These scientific investigations and experiments provided the first-hand opportunity to study a comet up close, enhancing our understanding of the origins, composition, and evolution of comets.