How Does Starlink Work? Satellites, Lasers and Dishes Explained

Starlink works by beaming internet between a dish at your home and thousands of SpaceX satellites in low Earth orbit, which pass your data to ground stations connected to the wider internet. Because the satellites fly far closer to Earth than traditional internet satellites, Starlink can deliver latency of around 25 milliseconds, low enough for video calls and online gaming.

What is Starlink?

Starlink is the satellite internet service run by SpaceX. It started launching satellites in 2019 and now operates the largest constellation in orbit, with more than 11,000 satellites, most of them second generation V2 models. SpaceX reported 13.6 million Starlink consumer subscribers as of September 30, 2026, plus hundreds of thousands of business customers, in its third quarter earnings release.

The service covers homes, RVs, boats, airlines and remote sites, and SpaceX is also pushing into direct to phone connectivity for ordinary smartphones.

How does Starlink work, step by step?

A Starlink connection has four main parts, and data moves through them in both directions every time you load a page:

• The dish: a flat phased array antenna that steers its beam electronically, with no moving dish needed to track the sky. It hands off from one satellite to the next as they pass overhead.
• The router: the dish connects to a Wi-Fi router, so phones, laptops and TVs use Starlink like any home connection.
• The satellites: they relay your traffic, either straight down to a ground station or across to other satellites first.
• Ground gateways: stations on Earth that link the constellation to fiber networks and, from there, to the websites and apps you use.

When you open a video, your request goes up to a satellite, down to a gateway, out to the video server, and the response returns along the same kind of path. All of that happens in a fraction of a second.

Why is Starlink faster than old satellite internet?

Distance is the key. Traditional satellite internet relies on single geostationary satellites about 35,786 km above the equator. Starlink satellites orbit at roughly 550 km, so the round trip is far shorter. According to Starlink's technology page, that cuts latency to around 25 ms, compared with 600 ms or more for geostationary services.

SpaceX is also lowering many satellites to even lower orbits, which further shortens the trip. The trade off is that low satellites move fast across the sky, so you need thousands of them to keep a dish connected at all times.

What do the space lasers do?

Each Starlink satellite carries three laser links that connect it to its neighbors. Together they form a mesh network in space, so data can hop from satellite to satellite before coming down. That matters over oceans, polar regions and war zones where there is no ground station nearby.

Lasers also give Starlink a route that does not depend on undersea cables, although most of the world's traffic still runs through them. If you want to compare the two systems, read our explainer on how undersea cables work.

How fast is Starlink?

Speeds depend on the plan, location and how many people share the same satellite beams. Residential download speeds are often around 100 Mbps or more, while Starlink and independent testers generally put latency in the 25 to 60 ms range. Performance can dip at busy evening hours in crowded areas, and heavy rain or snow can cause short drops.

The total capacity of the network is set to grow quickly. Elon Musk said in November that V3 satellites launched on Starship should give Starlink about 100 times more bandwidth within two to three years, as we covered in our story on Starlink capacity growth.

Can Starlink work on a regular phone?

Yes, in a limited way. Starlink's direct to cell satellites act like cell towers in space, letting standard LTE phones send texts and use some data where mobile carriers have partnered with SpaceX. Full speed broadband still requires the dish. SpaceX is working on faster phone service too, including a dedicated chip covered in our report on the Starlink 5G phone chip.

What are Starlink's downsides?

• Cost: the dish and monthly plan cost more than cable or fiber in most cities.
• Clear sky needed: trees, buildings and mountains that block the view of the sky reduce performance.
• Shared capacity: speeds can drop where many users share the same cell.
• Space debris concerns: astronomers and safety experts worry about the sheer number of satellites in low orbit, although SpaceX says it deorbits old satellites and shares tracking data.

Is Starlink worth it?

Starlink makes the most sense where fiber, cable or fast 5G home internet is not available, such as rural areas, boats and remote work sites. In cities with good wired options, it is usually more expensive and not faster. For everyone else, it has turned satellite internet from a last resort into a service that can handle streaming, gaming and video calls.