A packet's journey through low Earth orbit

The internet
is moving.

Starlink is not “a satellite with Wi‑Fi”. It is a moving network of electronically steered radio links, fast optical links between spacecraft, gateways and terrestrial routing. Scroll to make one packet travel through it.

terminalRFsatellite laser meshgatewayinternet
SCROLL TO DRIVE THE NETWORK ↓
RF LINK OPTICAL GROUND PACKET
SYSTEM OVERVIEW / LEO
LINK IDLE
PATH —
STEP 01
SCROLL TO DRIVE THE VIEW
FOLLOW THE PACKET
01 / User terminal

The “dish” is really a steerable radio.

The flat user terminal is a phased array: many small radiating elements work together. By changing the relative phase of those elements, the terminal makes the electromagnetic wave add strongly in one direction and cancel more elsewhere. The beam moves electronically instead of the whole antenna turning.

What the animation means
ELEMENTS FIRED WITH DIFFERENT PHASE → WAVEFRONTS ALIGN → ONE NARROW BEAM EMERGES.
0° → θelectronic steering
Kuuser link band
WATCH the array elements pulse in sequence and the beam tilts as the phase changes
02 / First hop

That beam locks onto a moving satellite.

The terminal can see multiple spacecraft as they cross the sky. It forms a narrow RF link toward one of them, while the constellation keeps looking for the next viable connection. The spacecraft is moving continuously; the network does not wait for it to stop.

What the animation means
THE RF BEAM TRACKS THE SPACECRAFT. THE TERMINAL STAYS ON THE GROUND.
~550 kmtypical LEO shell
LEOfast apparent motion
FOLLOW the cyan beam and the lime packet from the terminal to satellite A
03 / Handoff

The network moves the link before it breaks.

LEO satellites move quickly across the sky. Starlink evaluates which satellite can provide the better usable path and switches the active link while the session continues. The important idea is continuity: the network changes the spacecraft carrying the radio connection without making you re‑point an antenna by hand.

What the animation means
A FADES → B RISES → B IS PREPARED → PACKET TRANSFERS TO B.
WATCH the first beam fade while the second one grows before the handoff completes
04 / Space-to-space

Once in orbit, lasers can move the packet sideways.

Modern Starlink spacecraft can use optical inter-satellite links. Laser terminals point at neighboring satellites, acquire the link and send traffic through free space. That means a packet does not have to fall to Earth after every satellite hop.

What the animation means
RF GETS THE PACKET INTO ORBIT → LASERS MOVE IT ACROSS THE CONSTELLATION.
3×V2 Mini optical links
200 Gbpsup to per link
NOTE Starlink's newer V3 design describes 6 optical links rated up to 400 Gbps each
05 / Gateway

The gateway is where space meets fiber.

Eventually the packet has to enter terrestrial infrastructure. A Starlink gateway talks to the spacecraft over RF, while its terrestrial side connects to Starlink's ground network and internet Points of Presence. It is the bridge between the moving orbital network and the fixed fiber world.

What the animation means
SATELLITE RF DOWNLINK → EARTH STATION → TERRESTRIAL NETWORK → INTERNET.
WATCH the packet change transport domain from RF in space to fiber on the ground
06 / Routing

There is no single Starlink route.

The topology changes as satellites move, gateways become available, links congest and obstructions change. Traffic can stay in space for several hops or drop to Earth earlier when that is the better path. Think of it as a moving graph, not a permanent wire.

What the animation means
ONE PATH BECOMES UNAVAILABLE → THE PACKET TAKES A DIFFERENT PATH THROUGH THE GRAPH.
DYNAMICtopology
REAL-TIMEpath selection
WATCH the middle route disappear and the packet bend around the gap
07 / The whole system

The dish is only the front door.

The full system is a composition: steerable user terminals, moving LEO routers, high-capacity optical links, gateways and terrestrial Points of Presence. From your laptop it looks like ordinary internet access. Underneath, it behaves much more like a distributed network whose routers happen to be flying around Earth.

The complete packet journey
LAPTOP → TERMINAL → RF → SATELLITES → LASER MESH → GATEWAY → INTERNET → RETURN.
FINAL VIEW watch the complete path play end-to-end

Why this architecture matters

LEO reduces propagation distance. Phased arrays make links steerable without large mechanical antennas. Optical inter-satellite links let traffic cross space without touching terrestrial fiber at every hop. Gateways reconnect the orbital layer to the internet. Together, those pieces trade fixed infrastructure for a moving, redundant graph.

Engineering notes & sources
The supplied source text notes Starlink's phased-array antennas, optical inter-satellite links, automatic satellite switching, and newer V3 optical-link capabilities. This explainer keeps those claims and uses the animation as a conceptual model rather than a scale-accurate simulation.

Starlink Technology · Starlink Beam Switching · Starlink V3 Satellites · Starlink latency engineering note