How to See the International Space Station from the UK

The International Space Station is one of the most remarkable objects you can observe in the night sky—and you do not need a telescope to see it.

Travelling hundreds of kilometres above Earth at approximately 28,000 kilometres per hour, the ISS regularly passes over the UK as a brilliant point of light. It can become brighter than almost anything else in the night sky, making it an excellent target for beginners, families and experienced observers alike.

Here is everything you need to know to identify and observe the International Space Station.

What Is the International Space Station?

The International Space Station, usually shortened to ISS, is a permanently crewed research station orbiting Earth.

Construction began in 1998, with different sections carried into space and assembled in orbit. It has been continuously occupied since November 2000 and is operated through an international partnership involving NASA, the European Space Agency, Roscosmos, JAXA and the Canadian Space Agency.

The station acts as a home and laboratory for astronauts and cosmonauts. Research conducted aboard it helps scientists study subjects including:

• Human health in microgravity

• New materials and manufacturing methods

• Earth’s atmosphere and climate

• Plant growth in space

• Technologies for future missions to the Moon and Mars

The ISS is roughly the size of a football pitch when its solar arrays are included. Despite its enormous size, its distance from Earth means that it normally looks like a bright, moving star when seen without magnification.

How High Is the ISS?

The station generally orbits approximately 400 kilometres above Earth, although its exact altitude changes. Small amounts of atmospheric drag gradually lower its orbit, so spacecraft engines are periodically used to raise it again.

The ISS completes an orbit roughly once every 90 minutes. That means its crew experiences around 16 sunrises and sunsets during a single Earth day.

Although it circles the planet several times each day, it will not be visible from your location during every orbit. Its route, the position of the Sun, local daylight and cloud cover all affect whether you can see a particular pass.

What Does the ISS Look Like?

To the naked eye, the International Space Station looks like an exceptionally bright star moving smoothly and silently across the sky.

It can usually be distinguished from an aircraft because it:

• Does not have flashing navigation lights

• Does not leave a visible trail

• Moves steadily without changing direction

• Makes no audible engine noise

• Usually travels from west towards east

• May become brighter as it climbs higher in the sky

An aeroplane often flashes red, green or white and may appear to turn. The light from the ISS is normally constant, although its brightness can change during a pass.

The station can occasionally fade suddenly and disappear before reaching the horizon. This happens when it enters Earth’s shadow and is no longer illuminated by sunlight.

Why Is the International Space Station So Bright?

The ISS does not produce the bright light you see. Instead, sunlight reflects from its large solar arrays and other exterior surfaces.

Visible passes normally occur shortly after sunset or before sunrise. At these times, the observer is standing in darkness while the station—hundreds of kilometres above Earth—is still illuminated by the Sun.

On a favourable pass, the ISS can outshine every star and planet in the sky. It may even rival Venus in brightness.

When Can You See the ISS from the UK?

There is no single daily viewing time because each pass is different. There may be several visible passes within a week, followed by a period with fewer convenient opportunities.

The most useful place to check is NASA’s Spot the Station service. Enter your location to find upcoming passes and see:

• The date and time

• How long the station will remain visible

• Its maximum height above the horizon

• The direction in which it will appear

• The direction in which it will disappear

You can also follow its current position using the ESA live ISS tracker.

Remember that pass predictions are location-specific. Times for London may differ slightly from those in Cardiff, Swansea, Carmarthen or elsewhere in Wales, so always enter your nearest town or exact observing location.

Understanding an ISS Pass Prediction

A prediction might say:

Appears: West
Maximum height: 65°
Disappears: East
Visible: 5 minutes

This means you should begin by facing west. The ISS will rise above the western horizon, travel across the sky and reach a maximum elevation of 65 degrees before continuing eastwards.

Elevation is measured from the horizon:

• 0° is directly on the horizon

• 30° is around one-third of the way up the sky

• 45° is halfway between the horizon and overhead

• 90° is directly above you

Higher passes are generally easier and more impressive. A pass reaching 50 degrees or more is normally worth watching, while one passing close to 90 degrees may cross almost directly overhead.

A simple way to estimate angles is to hold your fist at arm’s length. The width of your fist represents approximately 10 degrees of sky.

How to Observe the ISS

1. Check the weather

You need a reasonably clear view of the sky. Thin cloud may still allow an especially bright pass to be seen, but thick cloud will hide the station completely.

2. Find an open location

Choose somewhere with a broad view in the direction where the ISS will first appear. Buildings, trees and hills can make low passes difficult to see.

You do not need to travel to a dark-sky site. The ISS is bright enough to be observed from towns and cities, although an open rural location can make the whole experience more enjoyable.

3. Arrive a few minutes early

Be outside and ready at least five minutes before the predicted time. ISS passes are calculated precisely and the station will not wait while you put on your shoes or find your camera!

4. Face the correct direction

Use a compass or smartphone to identify the appearance direction. Begin watching slightly above the horizon and look for a bright point moving steadily against the stars.

5. Keep watching

A good pass may remain visible for several minutes. Follow the ISS across the sky until it sets or enters Earth’s shadow.

Do You Need a Telescope?

No. The naked eye is usually the best way to enjoy your first ISS pass.

A telescope has a very narrow field of view, while the station moves quickly across the sky. Keeping it centred manually can be extremely challenging, particularly when using high magnification.

If you would like a closer view, start with a pair of binoculars. Low-powered models with a wide field of view are generally easier to use than highly magnified binoculars.

Try locating the ISS with your eyes first, then carefully raise the binoculars while continuing to follow its path. Depending on the magnification, viewing conditions and height of the pass, you may notice that it is not perfectly point-like. Its shape can sometimes appear slightly elongated or angular.

A telescope can potentially reveal more structure, including the main body and solar arrays, but successfully tracking it requires practice. Begin with your lowest-powered eyepiece to achieve the widest possible field of view.

Tips for Observing Through Binoculars or a Telescope

• Use low magnification initially

• Practise following aircraft or distant birds during daylight

• Focus your equipment on the Moon or a bright star beforehand

• Start tracking before the station reaches its highest point

• Use a smooth, easily moved mount

• Keep both eyes open while initially locating the ISS

• Do not attempt to swap eyepieces during the pass

Explore our range of eyepieces and Barlow lenses if you need a suitable low-powered eyepiece for wide-field observing.

Can You See the Astronauts?

Unfortunately, individual astronauts cannot be seen from the ground. Even during an overhead pass, the ISS remains hundreds of kilometres away.

A large telescope and specialist tracking equipment may capture recognisable images of the station’s solar panels and modules, but resolving a person aboard or outside the station is beyond ordinary amateur equipment.

It is still extraordinary to remember that the moving light above you is a crewed spacecraft, with people living and working inside it.

How to Photograph an ISS Pass

There are two main ways to photograph the station.

Photographing an ISS trail

This is the most accessible method. A long exposure records the ISS as a bright line crossing the sky.

You will need:

• A camera with manual exposure control

• A wide-angle lens

• A sturdy tripod

• A remote release or self-timer

• A fully charged battery

A useful starting point is:

• Manual exposure mode

• Aperture around f/2.8 to f/4

• ISO 400–1600

• Exposure of 10–30 seconds

• Manual focus set carefully on a bright star

• RAW image format where available

Compose the photograph before the pass begins. Including a landmark, tree, observatory or interesting foreground can create a much stronger image than photographing an empty sky.

For a longer trail, take a sequence of exposures and combine them during editing. This also reduces the risk of an entire attempt being spoiled by camera movement or an unwanted light.

Photographing the station itself

Capturing recognisable detail is much harder. It requires a long focal length, fast shutter speed, accurate focusing and the ability to follow the ISS smoothly.

The station is brightly illuminated, so exposures must be shorter than you might expect. Settings will vary, but a fast shutter speed—often around 1/1000 second or faster—can help prevent motion blur and overexposure.

This is an advanced challenge, so do not be discouraged if your first images show only a bright dot. Accurate tracking takes considerable practice.

Watching an ISS Solar Transit

Very occasionally, the ISS passes directly in front of the Sun from a particular location. Known as a solar transit, the event may last for less than a second.

Photographing or observing one requires extremely accurate planning and proper solar equipment.

Never look directly at the Sun through binoculars, a telescope, camera or finderscope without a certified solar filter securely fitted over the front of the instrument. Permanent eye damage can occur almost instantly.

An ordinary eyepiece filter, sunglasses, photographic neutral-density filter or improvised material is not safe. Read our guide to solar filters before attempting any form of solar observation.

Is the ISS Visible During the Day?

Exceptionally experienced observers may sometimes locate the station in daylight under favourable conditions, but this is considerably harder than observing it after sunset.

For most people, the best opportunities are evening or early-morning passes when the sky is dark enough to provide strong contrast.

Never sweep the daylight sky with binoculars or a telescope when the Sun is nearby. Accidentally pointing an unfiltered instrument towards the Sun can cause severe and permanent eye damage.

Make It a Family Observation

Watching the ISS is a wonderful introduction to astronomy for children. It requires no specialist knowledge, the event lasts only a few minutes and the result is easy to recognise.

You could make the experience more engaging by:

• Finding out who is currently aboard the station

• Following its live position before the pass

• Predicting where it will appear

• Timing how long it remains visible

• Drawing its route across the sky

• Watching a live view of Earth from the station

• Comparing several passes at different elevations

A bright ISS pass can be the perfect starting point for exploring the Moon, planets and constellations together.

Frequently Asked Questions

Is the ISS visible every night?

No. Although it passes around Earth many times each day, the station must be above your horizon, illuminated by the Sun and seen against a sufficiently dark sky. Visible passes tend to occur in groups.

Does the ISS always travel in the same direction?

From the UK, visible passes generally move from a westerly direction towards the east. The exact route varies between passes.

Why did it suddenly disappear?

The ISS may have entered Earth’s shadow. Once direct sunlight no longer reaches it, the station can fade rapidly even though it is still above the horizon.

Can you hear it?

No. Sound cannot travel from the ISS through the vacuum of space, and the station is far too high for any operational noise to reach the ground.

Is it a plane or a satellite?

If the object has flashing lights, changes direction or is accompanied by engine noise, it is probably an aircraft. The ISS normally appears as a steady, silent light moving smoothly across the sky.

Does light pollution affect ISS viewing?

Very little. Light pollution makes faint stars and deep-sky objects harder to see, but the ISS can become bright enough to remain clearly visible from a city centre.

Look Up and Wave

Seeing the International Space Station is a simple but unforgettable observing experience. No telescope, dark-sky site or advanced knowledge is required—just a clear sky, an accurate pass prediction and a few minutes outside.

When that brilliant point of light crosses the sky, remember that you are looking at a laboratory travelling around Earth at approximately 28,000 kilometres per hour, with a crew living and working aboard it.

You can even give them a wave. They will not see you, but it is all part of the experience.