Elon Musk Unveils Stargaze, SpaceX's Plan to Keep Space Safe

In a post on X, the billionaire entrepreneur revealed that SpaceX has developed a proprietary Space Situational Awareness system called Stargaze, which will be made freely available to satellite operators worldwide in the coming weeks.

The system is designed to provide precise positional awareness of objects in Earth orbit, dramatically reducing the risk of satellite collisions that generate long-lasting space junk.

Musk said the move reflects a growing need for better coordination in low Earth orbit, where congestion has increased sharply due to the rapid expansion of satellite constellations and continued reliance on legacy tracking methods.

A New Approach to Space Situational Awareness

SpaceX's decision to open Stargaze to the broader industry comes amid rising concern over unsafe practices such as uncoordinated satellite manoeuvres, abandoned rocket bodies, and anti-satellite weapons tests.

Conventional tracking systems often observe objects only a few times per day, leaving operators with significant uncertainty in orbital predictions and little time to respond to sudden changes.

Stargaze represents a step-change in how objects in low Earth orbit are detected and tracked. Unlike traditional ground-based radar systems, the platform draws on data from nearly 30,000 star trackers embedded across SpaceX's satellite fleet.

These trackers continuously observe nearby objects, collectively detecting around 30 million orbital transits each day.

The system autonomously aggregates these observations to generate near real-time estimates of position and velocity for all detected objects. These predictions feed directly into a space-traffic management platform that identifies potential close approaches and generates Conjunction Data Messages, or CDMs, within minutes rather than hours.

According to SpaceX, this several-order-of-magnitude improvement in detection and processing speed addresses one of the biggest weaknesses in existing space safety infrastructure. Volatile space weather and infrequent observations have long compounded errors in orbital forecasts, increasing the likelihood of surprise conjunctions.

Free Access for Satellite Operators

To maximise the safety benefits of Stargaze, SpaceX will provide conjunction screening results to all satellite operators at no cost. The platform has already been operating in a closed beta with more than a dozen participating operators, enabling low-latency sharing of trajectory predictions and collision risk assessments.

From this spring, operators that submit their own ephemeris data will receive CDMs generated against Stargaze data, as well as against ephemeris shared by other participants. SpaceX says this reciprocal model ensures that operators gain access to the best available information while encouraging broader cooperation across the industry.

Musk said that providing the service free of charge reflects the collective interest in keeping orbital pathways safe and usable. 'This will greatly reduce the probability of collisions that create orbital debris hazards,' he wrote, adding that unchecked debris growth threatens all current and future space missions.

A Proven Track Record in Orbit

SpaceX highlighted a late-2025 incident involving a Starlink satellite and a third-party spacecraft whose operator was not sharing trajectory data. Initially, the predicted miss distance was around 9,000 metres, well within safe margins.

However, just five hours before closest approach, the third-party satellite executed an unannounced manoeuvre that reduced the miss distance to approximately 60 metres.

Stargaze detected the change almost immediately and issued updated CDMs across the platform. As a result, the Starlink satellite was able to plan and execute an avoidance manoeuvre within an hour, reducing collision risk back to zero. SpaceX said such a response would have been impossible using legacy radar systems or slower screening processes.

The Case for Shared Trajectory Data

While Stargaze significantly enhances autonomous detection, SpaceX stressed that frequent ephemeris sharing by operators remains essential. The company compared space traffic management to commercial aviation, where aircraft avoid collisions by broadcasting their position and flight plans in real-time.

Starlink updates and publishes its ephemeris every hour, and SpaceX urged other operators, particularly those with manoeuvring spacecraft, to adopt similar practices. Without widespread data sharing, even the most advanced detection systems risk being forced into unnecessary avoidance manoeuvres, increasing fuel consumption and operational complexity.

As satellite numbers continue to grow, initiatives like Stargaze may prove critical in preventing low Earth orbit from becoming dangerously congested.