National Space Society conference draws record attendance, spotlights commercial space

The National Space Society says its 2026 International Space Development Conference wrapped June 7 with one of its strongest domestic attendance totals in years. The event in Merritt Island, Florida, brought together NASA leaders, astronauts, entrepreneurs, students, and advocates while previewing ISDC 2027 in Los Angeles.

Why it matters: - The International Space Development Conference remains the largest citizen space conference in the world, drawing more than 1,000 attendees a year. - The event connects NASA leaders, astronauts, researchers, entrepreneurs, students, and space advocates in one place. - The 2026 turnout signals continued interest in commercial space, lunar development, and space education.

What happened: - The National Space Society’s annual International Space Development Conference concluded June 7 in Merritt Island, Florida. - Attendees gave the conference one of its best domestic attendance records in recent years. - The conference will enter its 45th year in 2027. - Featured speakers included Apollo 17 astronaut Harrison Schmitt, Apollo Flight Director Gerry Griffin, author David Brin, astronauts Michael López-Alegria, Steven Hawley, Susan Kilrain, and Robert “Hoot” Gibson. - Other speakers included Lindy Elkins-Tanton, Jim Green, Bill Diamond, Pascal Lee, and Aarti Holla-Maini, director of the United Nations Office for Outer Space Affairs. - The appearance by a United Nations representative was the first at an ISDC.

The details: - Firefly, Axiom Space, and Vast presented updates on their work toward a commercial future in space. - López-Alegria outlined Axiom Space’s plan for a commercial space station after the International Space Station. - The National Space Society recognized members of the Firefly Blue Ghost team for the first fully successful commercial landing on the Moon. - The NSS education team ran workshops for hundreds of students. - Student participants came from two NSS competitions: the Live in a Healthy Space Design Competition and the Gerard K. O'Neill Space Settlement Contest. - Student poster sessions featured ideas for space settlements from young people around the world. - Students were recognized at multiple award ceremonies. - Three finalist teams in the Martine Rothblatt Space Settlement in Our Lifetime Business Plan Competition presented their plans to the audience. - Audience scoring determined the three cash-prize winners. - The competition awarded a total of $32,000. - The conference website is isdc.nss.org.

Between the lines: - The speaker roster suggests the space sector is still blending legacy NASA experience with new commercial players. - The first UN presence at ISDC points to broader international interest in space governance and development. - The student competitions show NSS is using the conference as a pipeline for the next generation of space professionals and advocates. - The commercial space station push from Axiom and the Moon landing award for Firefly reflect how fast private spaceflight has moved from concept to execution.

What's next: - ISDC 2027 is scheduled for May 27-30 in Los Angeles. - The event will be held at the Sheraton Gateway Los Angeles Hotel. - NSS says seniors, students, and members can get special discounts. - More information is available on the conference website at conference website.

The bottom line: - ISDC 2026 underscored how commercial space, student talent, and public interest are converging around the next phase of space development.