The lunar ledger

A global lunar database of objects and activities.

Meet the Lunar Ledger’s first commercial partners—companies helping set new norms for transparency, safety, and information sharing on the Moon.

Firefly Aerospace signing Open Lunar's Lunar Ledger at the International Astronautical Congress 2025 in Sydney, Australia.

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Learn how the Ledger is engaging with the UN and international partners to support responsible lunar activity from the beginning.

Open Lunar Foundation's Tabletopping Exercise at the International Astronautical Congress in 2025.

Explore the Latest Updates

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Spacedata—Powering Lunar Risk Intelligence as a Lunar Ledger Signatory

Dymon—Mission Operations Innovation Joins the Lunar Ledger

JAOPS—Strengthening Lunar Collaboration Through Mission Operations Integration

OUR MISSION

Humanity is returning to the Moon, with governments, scientific organizations, and commercial ventures preparing for new opportunities. Over 100 missions are planned by 2030, supported by significant investment and increasing momentum towards a sustained lunar presence.

However, current progress highlights a need for greater transparency and coordination. Clear, reliable information is essential to support safety, effective planning, and responsible growth.

The Lunar Ledger is a collaborative initiative developed to address this need. By providing centralized, verified mission data globally, it enables stakeholders across sectors to reduce risk, improve coordination, and contribute to a sustainable lunar environment.

Grounded in research on space law, international norms, and commons governance, the Ledger draws on published work that informs its design and demonstrates the need for a trusted, shared system for lunar activity.

Explore the Research

“A lunar Registry could work as an essential tool for coveted locations where we will see increased activities, such as the Peak of Eternal Light or the Lunar South Pole.”

— Jonathan McDowell, Astronomer and Astrophysicist at the Harvard–Smithsonian Center and Lunar Leddger Advisor

Our Partners

The Lunar Ledger’s partner community spans the global lunar ecosystem—bringing together commercial operators, space agencies, researchers, policymakers, and civil society organizations. Partners play a direct role in shaping how information is shared and coordinated on the Moon. By convening organizations that may not otherwise collaborate, the Lunar Ledger creates a shared foundation for trust, coordination, and responsible behavior—helping ensure the Moon is explored safely, transparently, and cooperatively.

Learn how to partner

Lunar Ledger Founding Partners

The Lunar Ledger’s founding partners are setting a precedent for how lunar activity can be conducted responsibly. By committing to voluntarily share mission information through the Ledger, these early partners are helping establish a shared foundation of transparency, coordination, and trust as activity on and around the Moon accelerates.

As some of the first commercial organizations to participate, founding partners play a critical role in demonstrating how open information-sharing can reduce operational risk, improve safety, and support peaceful coexistence on the lunar surface. Their leadership helps translate long-standing principles of cooperation in space into practical, real-world systems that benefit the entire lunar community.

Together, these partners are helping shape the norms and infrastructure that will guide sustainable lunar operations for decades to come.

Firefly Aerospace

“Continuing the trend of transparency Firefly demonstrated during Blue Ghost Mission 1, we are joining the Ledger to set an example of stewardship for safe and sustainable lunar operations.”

Will Coogan, Lunar Lander Chief Engineer, Firefly Aerospace

ispace

We will contribute to the pioneering and peaceful development of the cislunar ecosystem by sharing information transparently. Never quit the lunar quest.

Takeshi Hakamada, CEO, ispace-inc

Astrolab

“At Astrolab we know the value of acting with transparency and inspiring trust; we see the potential of the Lunar Ledger to positively influence the coming lunar industry by being the voluntary, collaborative platform by which we can keep everyone informed of our activities on the Moon, and stay informed of the activities of others.”

Lunar Ledger Signatories

Our Lunar Ledger signatories are early participants who have voluntarily agreed to share select mission information through the Ledger. Their participation supports greater situational awareness and coordination as lunar activity increases.

GET INVOLVED

we’re committed to Building with the community.

We’re forming a diverse group of strategic advisors, collaborating with beta users to inform product development, and partnering with initial data providers.

The Ledger will remain open and neutral, guided by responsible community stewardship. Our commitment is building trust and lasting value through transparency, collaboration, and engagement.

Learn how to get involved