The Night Sky Report: How Many Satellites Fly Over Your House?
Step outside after dark in a typical UK town, and there are around 710 satellites in the sky above you. Most are low down near the horizon, hidden behind buildings and trees. But 79 are high overhead, well above the rooftops. Over a single night, 12,891 different satellites pass over.
The night sky has never been this crowded. There are now 20,095 satellites in orbit, almost four times as many as at the end of 2019, and 70% of the active satellites in low Earth orbit belong to a single network, SpaceX's Starlink.
So how many satellites fly over your house? In this report, we tracked every active satellite in low Earth orbit over 186 UK towns and cities to find out how busy the sky above you really is, why the south of the UK gets far more satellites than the north, and where you have the best chance of spotting one.
Contents
The Night Sky In Numbers
Of the 16,662 active satellites currently in orbit, 15,883 are in low Earth orbit, below about 2,000 km (1,242 miles). These are the satellites that move across the sky, circling the Earth every 90 minutes or so. Higher satellites, such as the ones that carry TV signals, sit in one spot above the equator and never pass overhead.
Over a typical UK town on an October night, at any moment after dark:
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710 satellites are above the horizon.
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310 are passing overhead, more than 10° up and clear of rooftops and trees.
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79 are high in the sky, more than 30° up.
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105 are catching the sunlight while the sky below is dark.
That last figure matters most for anyone looking up, because satellites have no lights of their own.
Every satellite you see crossing the night sky is reflecting sunlight. It can only be spotted when it's high enough to still be lit by the sun after the sky on the ground has gone dark. That's why the best time to look is just after dusk. In Penzance, the number of satellites catching the sunlight peaks at 355 just after dusk, before falling as the satellites pass into the Earth's shadow.
Over a whole night, a typical UK town has 12,891 different satellites pass over it.
How Fast Is The Sky Filling Up?
For most of the space age, the number of satellites in orbit grew slowly. That changed in 2019, when SpaceX began launching its Starlink broadband network.
At the end of 2019, there were 120 Starlink satellites in orbit. Today there are 11,131. Over the same period, the total number of satellites in orbit (including ones that no longer work) has grown from 5,415 to 20,095.
Starlink now accounts for 70% of the active satellites in low Earth orbit, and it isn't the only mega-constellation on the way. As we covered in our Space Race Report, China's Guowang and Qianfan networks and Amazon Leo are all planning thousands more. The sky above the UK is only going to get busier.
Which Parts Of The UK Have The Most Satellites Overhead?
Where you live makes a big difference to how many satellites pass over you. Falmouth in Cornwall has the most of any place we looked at, with 83 high in the sky at any moment after dark. Lerwick in Shetland has the fewest, with 47. Across all 186 places, the further north you go, the fewer satellites pass high overhead.
Starlink is behind most of the gap. The way its orbits are arranged means Starlink satellites pass high over the south of the UK more often than the north. Further north, they tend to appear lower down, towards the southern horizon.
For Starlink alone, Falmouth has 4 times as many satellites high overhead as Lerwick (47 compared with 12).
Satellites Overhead By Nation.
|
Nation |
Places |
High in the sky (average) |
Starlink high in the sky (average) |
Different satellites per night (average) |
|---|---|---|---|---|
|
Wales |
9 |
80 |
44 |
12,964 |
|
England |
155 |
79 |
43 |
12,883 |
|
Northern Ireland |
7 |
72 |
36 |
12,432 |
|
Scotland |
15 |
61 |
25 |
11,148 |
Wales has the most satellites high overhead of the four nations, just ahead of England. Scotland has the fewest, with 61 on average, and 25 Starlink satellites compared with 44 in Wales.
How Many Satellites Fly Over The UK's Biggest Cities?
Southern cities top the list. Plymouth has 83 satellites high in the sky at any moment after dark, followed by Southampton, Brighton, Bristol and Cardiff (82) and London (81).
Further north, the numbers fall away. Manchester has 77, Belfast 73, Glasgow and Edinburgh 67, and Aberdeen 61. Inverness has the fewest of any major city, with 59.
Where Are The Best Places In The UK To Spot A Satellite?
More satellites overhead doesn't mean more chances of spotting one. Two things matter most: how dark your sky is, and how many satellites are catching the sunlight above you.
That’s where the far north wins. At this time of year, more satellites above northern Scotland are still lit by the sun after dark. Lerwick has 125 satellites catching the sunlight at any moment after dark, compared with 103 in Falmouth. Add some of the darkest skies in the UK, and the north of Scotland comes out on top.
Wick, Thurso, Stornoway, Kirkwall and Oban are the five best places in the UK for satellite spotting. Hexham in Northumberland and Kendal in Cumbria are the best places in England.
At the other end of the scale are the UK's big southern cities, such as London and Southampton, where artificial light washes out the sky. London gives off 241 times as much light at night as Brecon in mid Wales, the darkest place in our study.
The Darkest And Brightest Places.
|
Place |
Light at night within 5 km (nW/cm²/sr) |
|
|---|---|---|
|
Darkest |
Brecon |
0.35 |
|
Brightest |
London |
84.45 |
How To Spot A Satellite Tonight
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Pick your time: the best chance is in the first couple of hours after sunset, or before dawn, while satellites high above are still in sunlight.
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Get away from lights: even a few streets away from bright lights helps. Give your eyes 15 to 20 minutes to adjust.
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Look for a steady light: a satellite is a steady dot moving smoothly across the sky. Planes blink and have coloured lights.
What A Busier Sky Means For Engineers
Every one of those 15,883 satellites had to survive a rocket launch before it reached orbit, and it has to keep working in one of the harshest environments engineers design for. In low Earth orbit, a satellite moves from sunlight into the Earth's shadow and back again roughly every 90 minutes, so its parts heat up and cool down thousands of times a year. Even the smallest fixings, such as the precision screws holding panels and instruments in place, have to stay tight through all of it.
As more satellites are launched, the pressure on every part of that design grows. More satellites means more objects to track and avoid, and a greater risk of collisions that create debris, as we set out in our Space Debris Report. Dean Sladen, Quality Manager & Aerospace Engineer at Accu Components, explains what a busier sky means for the satellites themselves.
“Satellites don’t actually have any lights. When you see one moving across the sky after sunset, you’re seeing sunlight bouncing off its solar panels while you’re already in darkness.
There are now more than 20,000 satellites in orbit, so that reflection has become a real problem, especially for astronomers. Operators are trying to make satellites harder to see by using darker coatings, sunshades and reflective films. Fixing one problem creates another, though. A darker satellite absorbs more heat, and one in low orbit passes in and out of the Earth’s shadow around 15 times a day, so it’s constantly heating up and cooling down. Every part has to cope with that, down to the screws holding the panels together, which need to stay tight as the metal around them expands and contracts.
The bigger concern is how busy those orbits are getting. If two satellites collide, the debris can hit others, creating even more debris. That’s known as Kessler syndrome. It has already happened once on a large scale: in 2009, a working communications satellite hit a dead Russian one, creating more than 2,000 trackable pieces of debris. That’s why reliability matters so much now. A satellite has to keep working long enough to move out of the way of other objects, and to bring itself down safely at the end of its life.”
Dean Sladen
Quality Manager & Aerospace Engineer, Accu Components
Conclusion
The night sky over the UK has changed more in the last seven years than in the previous sixty. At any moment after dark, 79 satellites are high above a typical UK town, and 12,891 different satellites pass over it in a single night. Most of that is down to one company.
Where you live decides how many of them pass over you. The south of the UK has the most Starlink satellites passing high overhead, while the far north of Scotland sees far fewer. But when it comes to spotting them, the north comes out on top, with darker skies and more satellites catching the sunlight after dark.
With more mega-constellations on the way, the number of satellites passing over the UK every night is only going to rise. For the engineers designing them, every component has to be built to survive the launch, the harsh conditions in orbit and an increasingly crowded sky.
Methodology
We analysed US Space Force orbital data from CelesTrak for all 15,883 active satellites in low Earth orbit (below about 2,000 km), downloaded on 12 October 2026. Using the Skyfield astronomy tool, we calculated where every satellite was every 2 minutes after dark, from 12 to 18 October 2026, over 186 UK towns and cities. All figures are averages over those 7 nights.
“Passing overhead” means more than 10° above the horizon, and “high in the sky” means more than 30°. “Catching the sunlight” means a satellite is lit by the sun while the sky below is dark.
Light pollution figures come from NASA’s Black Marble night-lights data for 2025. The spotting score gives equal weight to how dark each place is and how many satellites are catching the sunlight above it. Growth figures come from the US Space Force satellite catalogue (SATCAT) and include satellites that no longer work. All data correct as of 12 October 2026.
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