NOAA's Office of Space Commerce will hold a Stakeholder Briefing on "Mission Authorization" on December 3, 2025 from 10:00 am-12:00 pm ET at the Department of Commerce Research Library, Herbert C. Hoover Building, 1401 Constitution Ave., NW, Washington, DC and online. More information is on the event's website, which says:

The Space Weather Roundtable of the National Academies of Sciences, Engineering, and Medicine will meet at the Keck Center, 500 5th St., NW, Washington, DC and online from December 4-5, 2025. More information and links to the livestream are on the event's website.

The space subcommittee of the House Science, Space, and Technology (HSS&T) Committee will hold a hearing in 2318 Rayburn House Office Building on December 4, 2025 at 9:00 am ET on "Strategic Trajectories: Assessing China's Space Rise and the Risks to U.S. Leadership."  The hearing will be livestreamed. Witnesses are: Mr. Dean Cheng, Senior Fellow, The Potomac …

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International Space Station Expedition 73 will end and Expedition 74 will begin when the Soyuz MS-27 spacecraft with its three-person crew (including NASA's Jonny Kim) undocks from the ISS on December 8, 2025 at 8:41 am ET. On December 7 at 10:30 am ET, a Change-of-Command ceremony will take place on the ISS with NASA …

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Women in Aerospace (WIA) and the British Embassy in Washington, DC will host the "WIA International Security Space Partners Event" on December 8, 2025 starting at 8:30 am ET at the British Embassy, 3100 Massachusetts Ave, NW, Washington, DC. More information is on the event's website, which says:

Update, December 4:  NASA has now provided the timeline of their return and NASA coverage.  Landing is on December 9 at 12:04 am EST. Sunday, Dec. 7: 10:30 a.m. – Expedition 73/74 change of command ceremony begins on NASA+ Amazon Prime, and YouTube. Monday, Dec. 8: 4:45 p.m. – Farewells and hatch closing coverage begins on NASA+, Amazon Prime, and YouTube. …

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Update, December 8, 5:45 pm ET:  The livestream link is not working.  Just called the committee and they apologize because their press release was in error and they never planned to livestream it. (The meeting isn't taking place in the committee's hearing room.)  A press release will be issued later. Update, December 8:  The committee …

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The Committee on Planetary Protection of the National Academies of Sciences, Engineering, and Medicine will meet from December 9-10, 2025 in Washington, DC.  The exact location was not available on the committee's website as of November 29.  Check that website for up to date information.  Open sessions will be livestreamed.  

ESA will host media briefings in several languages on December 9, 2025 in advance of the Arianespace launch of two Galileo navigation satellites. The launch is scheduled for December 17, 2025 from Kourou, French Guiana. The English-language briefing is at 11:00 Central European Time (5:00 am EST) and will air on ESA TV Two with …

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The National Academies of Sciences, Engineering, and Medicine will release the report "A Science Strategy for the Human Exploration of Mars" on December 9, 2025 at the Keck Center, 500 5th St., NW, Washington, DC from 12:00-1:30 pm ET.  It will be livestreamed. Credit: National Academies of Sciences, Engineering, and Medicine The report was co-chaired …

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The Mitchell Institute will release a policy paper on "Charting a Path to Space Superiority: The Cross-Domain Imperative" on December 9, 2025 from 1:00-2:00 pm ET. The event is virtual. More information is on the event's website, which says: Join the Mitchell Institute as Col. Jen “Boots” Reeves, USAF (Ret.) releases her latest policy paper …

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The Space Force Association will hold the 2025 Spacepower Conference will take place at the Hilton Orlando in Orlando, FL from December 10-12, 2025. More information is on the event's website.

The Maryland Space Business Roundtable (MSBR) will hold its next luncheon on December 10, 2025 from 11:30 am-1:00 pm ET at Martin's Crosswinds in Greenbelt, MD. The speaker is Shawn Domagal-Goldman, Acting Director, Astrophysics Division, NASA Headquarters. More information is on the event's website.

NASA's Planetary Science Division will hold a webinar on December 10, 2025 at 1:00 pm ET to discuss "Planetary Research: Year in Review." More information is on the event's website, which says:

Update, November 19:  The 43-day government shutdown (October 1-November 12) caused the postponement of many meetings. In the November 19 Federal Register, NSF announced a two-day AAAC virtual meeting for December 11-12, 2025, that presumbly incorporates what would have been discussed during the original one-day November 7 meeting (see below). More information on the December …

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The 2025 Eilene M. Galloway Symposium on Critical Issues in Space Law will take place on December 11, 2025 from 8:00 am-5:00 pm at Akin Gump, 2001 K St., NW, Washington, DC.  A virtual option is available. More information is on the event's registration page, which says:  

The 5-year anniversary of the Artemis Accords will be celebrated at an event on December 11, 2025 from 8:30-10:30 am ET in-person at the Meridian International Center, 1630 Crescent Place, NW, Washington, DC, and online. Pre-registration is required for both. Seating is limited. Meridian says it also will air on their social media channels that …

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Women in Aerospace (WIA) will hold its 2025 Awards Dinner on December 11, 2025 at the Ritz-Carlton, Pentagon City, Arlington, VA.  Originally scheduled for October 9, it was postponed to December 11 because of the government shutdown that began October 1. More information is on the WIA website.

The 2025 Annual Meeting of the American Geophysical Union (AGU) will take place December 15-19, 2025 in New Orleans, LA. More information is on the event's website, which says: Join thousands of scientists, educators, and policymakers at the premier Earth and space science conference 15-19 December in New Orleans, Louisiana. Explore groundbreaking research, connect with …

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The Satellite Industry Association (SIA) will hold its 21st Annual DOD/DOW Commercial Satcom Workshop from December 16-18, 2025 at the Hyatt Regency Crystal City, Arlington, VA. The event is co-sponsored by U.S. Space Command. The theme this year is "Perseverance Through Conflict." More information and the agenda are on the event's website.   Some sessions each …

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