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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The National Security Space Association (NSSA) will hold the Space Deterrence Forum on December 16, 2025 at Peraton in Chantilly, VA.  The forum is classified at the TS/SI-TK/NOFORN level. More information is on the event's website, which says: The National Security Space Association (NSSA) invites you to a classified TS/SI-TK//NOFORN Space Deterrence Forum, dedicated to advancing dialogue …

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The Washington Space Business Roundtable will hold its next luncheon on December 16, 2025 from 11:30 am-1:30 pm ET at Hogan Lovells, 555 13th St., NW, Washington, DC. The speaker is Taylor Jordan, newly appointed Director of the NOAA's Office of Space Commerce. Jordan also is NOAA's Assistant Secretary for Environmental Observation and Prediction. More …

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Reuters Events will hold a webinar on December 16, 2025 at 12:00 pm ET to discuss "Collision Course: Is Space Traffic Management Dead, and Will Europe Kill the Commercial Dream." More information is on the event's website, which says: The global effort to secure a coordinated Space Traffic Management (STM) system has stalled in the …

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The Center for Strategic and International Studies (CSIS) will hold a webinar on December 17, 2025 from 3:30-4:30 pm ET on "Assessing the Implications of China's Rise As a Space Power." More information is on the event's website, which says: In November 2025, the U.S.-China Economic and Security Review Commission released its annual report to …

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ESA Director General Josef Aschbacher and ESA Council Chair Renato Krpoun will brief the media on the results of the 342nd ESA Council meeting that is taking place December 17-18, 2025 in Paris, France.  The briefing will include the results of the 2025 ESA Council of Ministers meeting, CM25, that took place last month. The …

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The Investigations and Oversight subcommittee of the House Science, Space, and Technology (SS&T) committee will hold a hearing on December 18, 2025 at 10:00 am ET in 2318 Rayburn House Office Building on "Research Security: Examining the Implementation of the CHIPS and Science Act and NSPM-33."  The hearing will be webcast on the committee's website. …

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The Center for Strategic and International Studies (CSIS) will hold a webinar on December 18, 2025 from 10:00-10:45 am ET on "Space 'Year in Review': A 2025 Recap and 2026 Outlook." More information is on the event's website, which says: Let’s recap the year’s action in space. The CSIS Aerospace Security Project is rolling out …

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NASA's Outer Planets Assessment Group (OPAG) will hold a Town Hall meeting at the American Geophysical Union's (AGU) annual conference in New Orleans, LA, on December 18, 2025 from 6:00-7:00 pm CENTRAL time (7:00-8:00 pm Eastern).  It will be livestreamed. More information including the livestream link is on the OPAG website.

NASA's Aerospace Safety Advisory Panel will hold a telecon on December 19, 2025 from 2:00-3:00 pm ET to "deliberate on new formal recommendations for 2025." More information is in the Federal Register notice, which is reproduced below:   NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Aerospace Safety Advisory Panel; Meeting AGENCY: National Aeronautics and Space Administration (NASA). …

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NASA astronaut Jonny Kim will discuss his mission aboard the ISS at a news conference at Johnson Space Center on December 19, 2025 at 3:30 pm ET.  Kim returned to Earth on Soyuz MS-27 after eight months on the ISS with his Russian colleagues Sergey Ryzhikov and Aleksey Zubritsky on December 9. The news conference …

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Update: the launch was rescheduled for December 20 at 9:15 am ET. Update December 18, 12:00 pm:  The launch proceeded to T-2 minutes, but then scrubbed "after the launch team observed an issue with our built-in checks prior to the flight. We are assessing our next opportunity for launch." We are standing down from today’s …

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On December 18, 2025, President Trump announced that he is giving federal employees a three-day Christmas break, adding December 24 and December 26 to the traditional December 25 holiday. Government offices will be closed Wednesday-Friday.

December 25, 2025 is a U.S. Federal holiday in observance of Christmas.  Government offices will be closed.

January 1, 2026, New Year’s Day, is a U.S. Federal Holiday and government offices will be closed.

The 247th American Astronomical Society (AAS) meeting will take place January 4-8, 2026 at the Phoenix Convention Center in Phoenix, Arizona. More information is on the event's website.