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Lunar Safety Zone De-confliction: Understanding Great-Circle Conflict in Space

The Lunar Safety Zone De-confliction simulation helps us navigate the complex geometry of space safety zones on the Moon.

mysimulator teamUpdated June 2026≈ 3 min read▶ Open the simulation

What Lunar Safety Zones Are

Lunar safety zones are areas designated on the Moon's surface to ensure the safe operation of various missions. These zones can include crewed bases, mining operations, or science outposts. Each zone must be carefully planned and managed to avoid conflicts with other activities.

The Artemis Accords, Section 11, outlines specific guidelines for establishing these safety zones to prevent accidents and ensure compliance among different space agencies.

Great-Circle Conflict

A great-circle conflict occurs when two or more spherical-cap safety zones overlap on the Moon's surface. This is a critical issue because overlapping zones can lead to operational hazards, such as interference between different missions.

To avoid these conflicts, space agencies use geometric principles to ensure that each zone is properly defined and does not intersect with others.

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Spherical-Cap Safety Zones

A spherical-cap safety zone on the Moon is a region defined by a cap of a sphere. This cap represents the area where a particular mission or operation can safely occur without posing risks to other missions.

The geometry of these zones is based on great circles, which are the shortest paths between two points on a sphere's surface.

De-confliction Techniques

To manage and resolve conflicts between spherical-cap safety zones, de-confliction techniques are employed. These include manual adjustments by mission planners and automated systems that can nudge overlapping zones apart.

The 2D projection in the simulation allows users to visualize these zones and their potential overlaps more easily, facilitating better planning and management.

Frequently asked questions

How do great-circle conflicts affect lunar missions?

Great-circle conflicts can lead to operational hazards such as interference between different missions, which could result in delays or even safety risks.

What is the purpose of spherical-cap safety zones on the Moon?

Spherical-cap safety zones are used to define areas where specific lunar operations can safely occur without posing risks to other missions, ensuring compliance with international guidelines and preventing conflicts.

How does auto de-confliction work in the simulation?

Auto de-confliction uses algorithms to automatically adjust overlapping spherical-cap safety zones on the 2D projection of the Moon, helping to prevent great-circle conflicts without manual intervention.

Why is it important to use a 2D projection for lunar safety zone planning?

A 2D projection simplifies the visualization and management of spherical-cap safety zones on the Moon's surface, making it easier for mission planners to understand and manage potential conflicts between different operations.

Try it live

Everything above runs in your browser — open Lunar Safety Zone De-confliction (2D) and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open Lunar Safety Zone De-confliction (2D) simulation

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