In March 2015, Ceres became the first dwarf planet to be visited by a spacecraft when Dawn entered orbit.

Meanwhile, the MESSENGER probe was deliberately crashed into Mercury after 4 years of in-orbit observations.

On 23 November 2015, the Blue Origin New Shepard suborbital rocket achieved its first powered soft landing near the launch site, paving the way for full reuse of its propulsion stage.

On 21 December, the maiden flight of the SpaceX Falcon 9 Full Thrust took place, ending with a successful landing of its first stage.

Two old weather satellites, NOAA-16 and DMSP 5D-2/F13, broke up in 2015, creating several hundred pieces of space debris.