SpaceX Starship Booster B21 Static Fire
Static Fire
Booster 21 will be static fired as preparation for Starship Flight 14-
Roman Space Telescope Mission and Science Briefing
Press Event
The pre-launch mission and science briefing for the Nancy Grace Roman Space Telescope will take place in the NASA Kennedy Press Site auditorium with the following participants: * Shawn Domagal-Goldman, director, Astrophysics Division, NASA Headquarters * Julie McEnery, Roman telescope senior project scientist, NASA Goddard Space Flight Center * Vanessa Bailey, Roman Coronagraph Instrument scientist, NASA Jet Propulsion Laboratory * Kristen McQuinn, Roman Science Operations Center lead, Space Telescope Science Institute * Lee Armus, Roman Science Support Center lead, Caltech/IPAC
Roman Space Telescope Prelaunch News Conference
Press Event
The prelaunch news conference will take place in the NASA Kennedy Press Site auditorium with the following participants: * Nicky Fox, associate administrator, Science Mission Directorate, NASA Headquarters * Lucas Paganini, Roman telescope program executive, NASA Headquarters * Jackie Townsend, Roman telescope project manager, NASA Goddard * Denton Gibson, launch director, NASA’s Launch Services Program, NASA Kennedy * Julianna Scheiman, director, NASA Science and Dragon Programs, SpaceX * Justin McReynolds, launch weather officer, 45th Weather Squadron, U.S. Space Force
US EVA-99
EVA
NASA astronaut Jessica Meir and ESA astronaut Sophie Adenot will replace a retroreflector on the forward port of the space station’s Harmony module to support spacecraft navigation during rendezvous and docking operations. After installing the reflector, the crew will work to install jumper cables for the data-relay systems, prepare the Alpha Magnetic Spectrometer’s radiator for future maintenance, and replace a high-definition camera on the station’s truss.
Progress MS-33 Undocking
Spacecraft Undocking
The Progress MS-33 spacecraft will undock from the Poisk module of the International Space Station. It will then de-orbit and burn up in the atmosphere.
Progress MS-35 Docking
Docking
The Progress MS-35 spacecraft is scheduled to autonomously dock to the Poisk module of the ISS.
Juice Earth Flyby
Flyby
Third flyby of ESA's Jupiter Icy Moons Explorer (Juice) mission on its way to the Jovian system.
BepiColombo Mercury Orbit Insertion
Orbital Insertion
Orbital insertion around Mercury of the ESA-JAXA BepiColombo mission.
Solar Orbiter Venus Flyby
Flyby
Solar Orbiter, a partnership between ESA and NASA, will perform a gravity assist maneuver with Venus on December 24, 2026. Throughout its mission it also makes repeated gravity assist flybys of Venus to get closer to the Sun, and to change its orbital inclination, boosting it out of the ecliptic plane, to get the best – and first – views of the Sun’s poles.
Europa Clipper Earth Flyby
Flyby
NASA’s Europa Clipper will fly by Earth for a second and final gravity assist on its way to Jupiter.