Tag: Satellites

SpaceX says it will move roughly half of the Starlink satellite network into lower orbits during 2026, arguing that the change will materially reduce collision risk and speed up the removal of failed spacecraft as low Earth orbit becomes increasingly congested.

Starlink

Starlink is the satellite broadband network operated by SpaceX, and it has grown into the largest satellite constellation ever deployed. The network now consists of more than 9,000 operational satellites in low Earth orbit, providing internet connectivity to residential, government, and enterprise customers worldwide.

Apples To Just One Layer

The newly announced plan targets one specific layer of the constellation. Starlink vice president of engineering Michael Nicolls said (in a post on X) SpaceX intends to lower all Starlink satellites currently operating at around 550 kilometres above Earth down to approximately 480 kilometres. The migration will involve about 4,400 satellites and will be carried out gradually over the course of 2026.

In his public post on the X platform, Nicolls described the move as “a significant reconfiguration of its satellite constellation focused on increasing space safety”, adding that the lowering will be “tightly coordinated with other operators, regulators, and USSPACECOM”.

What Is Changing And Why It Matters

Low Earth orbit, often shortened to LEO, generally covers altitudes from about 160 km to 2,000 km above Earth. Satellites in this region travel at extremely high speeds, completing an orbit in roughly 90 minutes. LEO is attractive for communications services because it allows lower latency than higher orbits, yet it is also where orbital congestion is now growing most rapidly.

The Starlink satellites affected by this change currently operate at around 550 km and SpaceX now plans to lower them by roughly 70 km. While that difference may appear quite modest, it actually has significant implications for how long satellites remain in orbit if they lose control or suffer a failure.

The Sun’s Activity Cycle

Nicolls linked the decision directly to the Sun’s activity cycle. For example, solar activity follows an approximately 11-year pattern, with higher activity expanding the upper atmosphere and increasing drag on satellites. When solar activity declines towards solar minimum, the upper atmosphere becomes less dense, reducing drag and allowing satellites to remain in orbit for much longer at the same altitude.

“As solar minimum approaches, atmospheric density decreases which means the ballistic decay time at any given altitude increases,” Nicolls wrote on X. “Lowering will mean a >80% reduction in ballistic decay time in solar minimum, or 4+ years reduced to a few months.”

Ballistic decay time refers to how long an uncontrolled satellite takes to naturally lose altitude and re-enter Earth’s atmosphere. For example, a shorter decay time means failed satellites spend less time posing a collision risk to other spacecraft.

Recent Incidents

The announcement follows a rare Starlink satellite incident reported in late 2025. SpaceX said one of its satellites experienced a failure that involved venting propellant, tumbling out of control, and releasing a small amount of debris.

During the incident, the satellite rapidly lost altitude and communications were cut off. SpaceX said the debris consisted of “trackable low relative velocity objects” and that the spacecraft was expected to re-enter the atmosphere within weeks.

Although SpaceX has not said that a collision caused the failure, the incident has drawn attention to the growing difficulty of managing risk in crowded orbital environments. SpaceX has previously said that a Chinese satellite launch came within roughly 200 metres of colliding with a Starlink satellite, underlining how close some encounters in low Earth orbit have become.

Why Lower Orbits Are Seen As Safer

Nicolls has highlighted how lowering Starlink’s 550 km shell would improve safety in several ways, beyond simply speeding up re-entry for failed spacecraft, saying “the number of debris objects and planned satellite constellations is significantly lower below 500 km, reducing the aggregate likelihood of collision.”

For example, a satellite that fails at 550 km during periods of low solar activity could remain in orbit for several years, thereby increasing the time window in which it might be struck by another object. At around 480 km, natural atmospheric drag should pull an uncontrolled satellite down far more quickly, reducing long-term risk.

This approach aligns with broader industry efforts to ensure satellites do not remain in orbit for decades after failure, contributing to the gradual build-up of debris.

Low Earth Orbit Becoming Increasingly Crowded

It’s worth noting here that the number of satellites in low Earth orbit has increased sharply in recent years, largely driven by the rise of large satellite constellations. Starlink alone now accounts for the majority of active satellites in orbit.

Also, other major networks are also in development. For example, Amazon’s Project Kuiper aims to deploy more than 3,000 satellites, while China is understood to be planning multiple LEO constellations that could together exceed 10,000 spacecraft.

With thousands of satellites travelling at several kilometres per second, the risk of collisions has become a central concern for operators and regulators. Even small fragments of debris can cause catastrophic damage at orbital velocities.

These concerns are often discussed in the context of the Kessler Syndrome, i.e., a scenario in which collisions generate debris that triggers further collisions, eventually making certain orbital regions difficult or impossible to use.

Regulatory Scrutiny Is Increasing

Starlink’s orbit-lowering plan comes amid growing regulatory and political scrutiny of large satellite constellations. In the United States, regulators have moved to tighten disposal requirements for satellites in low Earth orbit, shortening the expected time allowed for defunct spacecraft to be removed after the end of their mission. The aim is to reduce the long-term accumulation of debris and lower systemic risk.

Public interest groups have also called for more cautious deployment of megaconstellations. For example, some have urged regulators to pause or more closely examine large LEO projects until the environmental and safety consequences of space congestion are better understood.

Also, concerns extend beyond collisions. For example, scientists have raised questions about the cumulative impact of frequent launches and satellite re-entries on the upper atmosphere, including the release of metals and other materials as spacecraft burn up.

Reliability Claims And Risks Beyond SpaceX’s Control

SpaceX has repeatedly stressed that Starlink satellites are designed to be highly reliable. In fact, Nicolls said there are “only 2 dead satellites” within the operational fleet of more than 9,000.

However, he emphasised that rapid de-orbiting remains important even with strong reliability figures. “If a satellite does fail on orbit, we want it to deorbit as quickly as possible,” he wrote.

Nicolls also highlighted hazards that SpaceX cannot directly control, including “uncoordinated manoeuvres and launches by other satellite operators”. As more constellations are deployed, the behaviour of every operator increasingly affects the safety of the entire orbital environment.

How Will The Migration Be Managed?

SpaceX has not released detailed technical procedures for the migration, but the underlying approach is broadly understood to be that each satellite will use onboard propulsion to gradually adjust its orbit in a controlled manner, lowering altitude while maintaining collision avoidance and tracking.

Nicolls said the process will be carried out in coordination with other satellite operators, regulators, and United States Space Command, which plays a central role in space domain awareness and conjunction warnings.

The movement of thousands of satellites over a single year will be closely watched across the space industry, as it may signal how megaconstellations adapt to rising congestion and evolving expectations around safety and sustainability in low Earth orbit.

What Does This Mean For Your Business?

Lowering thousands of satellites is a clear acknowledgement that congestion in low Earth orbit is no longer a theoretical problem but an operational one. SpaceX’s decision suggests that managing failure scenarios and end of life outcomes is becoming just as important as launch cadence and coverage expansion. Even a relatively small change in altitude can materially reduce how long failed hardware remains a hazard, which matters in an environment where collision risk compounds over time rather than staying static.

The move also sets a practical benchmark for other large constellation operators. For example, as more networks come online, regulators are likely to expect similar evidence that operators are actively reducing long term debris risk rather than relying solely on reliability claims. Coordination with other operators and military tracking bodies signals that large scale orbital changes are now part of routine constellation management, not exceptional events.

For UK businesses and public sector users that rely on satellite connectivity, particularly in rural areas, offshore operations, transport, defence, and emergency services, the announcement points to a more mature phase of satellite internet delivery. A safer and more actively managed orbital environment reduces the risk of service disruption caused by debris events or emergency manoeuvres. It also strengthens the long term viability of satellite broadband as a dependable part of national digital infrastructure rather than a stopgap solution.

For policymakers, insurers, and space regulators, the Starlink reconfiguration highlights where expectations are heading. For example, operators are now being judged not just on coverage and performance but on how responsibly they manage shared orbital space. Decisions made during this phase of LEO expansion will shape what remains usable decades from now, and whether satellite services continue to scale without triggering tighter intervention or enforced limits.