Per NASA’s press release:

NASA’s InSight lander has deployed its first instrument onto the surface of Mars, completing a major mission milestone. New images from the lander show the seismometer on the ground, its copper-colored covering faintly illuminated in the Martian dusk. It looks as if all is calm and all is bright for InSight, heading into the end of the year.

“InSight’s timetable of activities on Mars has gone better than we hoped,” said InSight Project Manager Tom Hoffman, who is based at NASA’s Jet Propulsion Laboratory in Pasadena, California. “Getting the seismometer safely on the ground is an awesome Christmas present.”