SpaceX opens 'Stargaze,' a free orbital collision-warning system built on Starlink's cameras

An operator files a planned maneuver for a satellite in low Earth orbit, and within minutes a screen lights up with a warning: another object, hardware or debris, is projected to come uncomfortably close. The warning did not come from a ground radar or a tracking telescope. It came from a star-tracker camera on a Starlink satellite passing overhead.

Stargaze, the orbital collision-warning service SpaceX opened to outside satellite operators on August 25, 2026, is built on roughly 30,000 optical star trackers mounted across the active Starlink fleet, the same cameras the satellites use to orient themselves in space. Repurposed as a distributed optical network, they capture about 30 million satellite and debris transits a day across low Earth orbit, the operational shells where most active satellites and the densest debris fields live. (Satnews)

Public space-tracking systems, mostly ground-based radars and optical telescopes, can typically recheck an object's position only a handful of times a day. Stargaze generates updated Conjunction Data Messages, the standard warning format operators use to decide whether to maneuver, within minutes of each transit detection, and it flags uncoordinated maneuvers by spacecraft that have not filed their intentions. For an operator weighing whether to burn fuel to dodge a fragment, a six-hour-old estimate is a different risk than a five-minute-old one (Satnews).

The system sits inside a Cooperative Research and Development Agreement (CRADA) between SpaceX, NOAA, and the Office of Space Commerce, the federal body tasked with standing up a civilian Traffic Coordination System for Space (TraCSS) for the United States. SpaceX first unveiled its space-traffic management platform in February 2026. Opening the feed to outside operators, under a federal research frame rather than a paid commercial contract, gives rival operators structured access to a private orbital mesh at a scale no public catalog currently matches. The CRADA structures the data-sharing but stops short of writing operational rules; the agency side is studying what cadence, format, and audit obligations should govern the substrate's outputs (Satnews).

They submit ephemerides, the technical term for an object's predicted orbital position over time derived from GPS telemetry and planned maneuvers, to the Stargaze data portal. SpaceX cross-screens those trajectories against its internal object catalog and the live positions of the Starlink fleet, then returns updated screening results. The "free" framing applies to the screening service itself, not to the data-licensing terms or any future commercialization, a distinction the Satnews write-up does not resolve.

The densest publicly described stream of low Earth orbit tracking data now flows from a private fleet whose operator also competes in the same launch and broadband markets as many of the operators receiving warnings. Public space-tracking infrastructure has not kept pace: ground-based radars and optical telescopes, the historical backbone of low Earth orbit tracking, recheck objects only a handful of times a day. The CRADA scaffolds the data flow; it does not yet prescribe cataloging standards, audit access, or how a disputed conjunction message would be adjudicated if a maneuver decision goes wrong.

The substrate has shifted faster than the rules. As of August 25, 2026, the most common source of low Earth orbit collision warnings for commercial operators is a private portal run by their largest competitor, under a research agreement with NOAA and the Office of Space Commerce. The CRADA that made the feed possible is the same document the agencies now use to write the cadence, format, and audit obligations for the data their operators already depend on.