If it seems like SpaceX launches a Falcon 9 rocket carrying Starlink satellites almost every week, you’re not imagining things. Launches have become so frequent that they’re almost routine, with each mission adding another 20 to 30 satellites to the growing network.

But why does Starlink need so many satellites? Traditional satellite TV services such as Sky and Freesat operate using just a handful of satellites, so why does Starlink require thousands?

The answer comes down to where the satellites orbit, what they’re used for, and how internet traffic works.

There Are Already Over 10,000 Starlink Satellites

As of July 2026, there are more than 10,800 operational Starlink satellites in orbit, making it by far the largest satellite constellation ever deployed. In total, SpaceX has launched over 12,500 Starlink satellites, with older spacecraft having already been retired and safely de-orbited as they reached the end of their working lives.

Even with a constellation of this size, SpaceX isn’t finished.

The company has regulatory approval for around 19,500 satellites, and longer-term plans envision a network of around 34,400 satellites. SpaceX has even submitted proposals for an eventual third-generation system that could expand far beyond that in the future, although those plans have yet to receive approval.

Why Can’t One Satellite Cover the Whole World?

Unlike television broadcasting satellites, Starlink satellites orbit much closer to Earth.

Traditional TV satellites sit in Geostationary Earth Orbit (GEO) at an altitude of 35,786 km. From that height, one satellite can cover roughly one-third of the Earth’s surface.

Starlink satellites orbit at only a few hundred kilometres above the Earth. Being so much closer dramatically improves internet performance, but it also means each satellite can only “see” a relatively small area on the ground.

Think of it like using a torch.

A torch held high above the ground lights a huge area but isn’t very bright. Hold it close to the ground and the light becomes much brighter—but it only covers a small patch.

That’s exactly the trade-off Starlink makes.

They’re Always Moving

Another major difference is that Starlink satellites never stay still.

Each satellite circles the Earth roughly every 90 minutes, travelling at around 27,000 km/h.

As one satellite disappears over the horizon, another takes its place. Your Starlink dish automatically switches between satellites without interrupting your connection.

To ensure there’s always another satellite ready to take over, several satellites need to be visible from every location at all times.

That alone requires thousands of satellites spread across dozens of orbital planes around the globe.

It’s About Capacity as Well as Coverage

Coverage is only part of the story.

Every satellite has a maximum amount of data it can carry. If too many customers connect through the same satellite, speeds would slow down.

Adding more satellites increases the overall capacity of the network, allowing more users to be served simultaneously while maintaining fast download and upload speeds.

This is similar to mobile phone networks. As more people use a network, operators build more cell towers to increase capacity. Starlink achieves the same goal by adding more satellites overhead.

Satellites Need Replacing Too

The frequent launches aren’t just expanding the network—they’re also replacing older spacecraft.

Starlink satellites are designed to remain in service for around five years. Once they reach the end of their operational life, they use their onboard propulsion systems to leave orbit and burn up safely in the Earth’s atmosphere.

Newer satellites are continually being launched with improved technology, larger antennas, more powerful onboard processors and enhanced laser links that allow satellites to communicate directly with one another in space.

This means the network is constantly being upgraded, rather than simply becoming larger.

Why Not Use Geostationary Satellites Instead?

A common question is why Starlink doesn’t simply use the same type of satellites as Sky or Freesat.

The answer is latency.

A signal travelling to a geostationary satellite and back has to cover around 72,000 km, resulting in delays of around 600 milliseconds.

By comparison, a Starlink satellite is only a few hundred kilometres away, reducing latency to around 20–40 milliseconds. That makes video calls, online gaming and web browsing feel much more like a fibre broadband connection.

The trade-off is that instead of needing just three or four satellites to cover much of the world, Starlink needs many thousands.

The Future of Starlink

The Starlink constellation will continue to grow over the coming years as SpaceX expands coverage, increases capacity and replaces ageing satellites. While over 10,000 satellites are already providing service, the company expects the network to eventually consist of tens of thousands of satellites, with around 19,500 currently authorised and a long-term vision of approximately 34,400 satellites.

So, while it may seem surprising to see a Falcon 9 launch almost every week, those regular missions are what keep Starlink’s unique low Earth orbit broadband network growing, improving and serving millions of customers around the world.