Oslo Stargazing & Astronomy Report
Light pollution and stargazing locations near Oslo
- City
- Oslo
- Country
- Norway
- Latitude
- 59.9139
- Longitude
- 10.7522
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 17.45
- Bortle class
- Class 9 (Class 9)
- Darkness Quotient
- 19%
- Dataset
- March 2026
Inner city sky
Stargazing in Oslo
Oslo is Norway’s capital, a waterside Scandinavian city in the country’s south-east with a distinctive setting between the fjord and forested uplands. The city generally experiences Extreme Light Pollution, with a Darkness Quotient of just 19% — placing it among the more light-polluted capital cities for urban stargazing.
In practical terms, brighter targets are the most realistic from within the city: the Moon, planets, double stars and the brightest open clusters. Faint deep-sky objects remain heavily washed out by the city glow.
Meaningfully darker skies do exist beyond Oslo, but they are not right on the doorstep. The nearest reasonable step up is around 55 kilometres to the east-north-east, near Hurdal, where conditions improve markedly.
The map shows Oslo as a strong, sprawling light dome, with an intense pink-white core surrounded by broad red, orange and yellow zones. That pattern points to a very bright urban centre whose glow spreads well beyond the city itself and merges into smaller surrounding settlements.
The quickest transition to darker skies appears away from the main built-up corridor, where the colours fade through green and blue into grey and near-black. The darkest-looking regions on this crop sit mainly to the west and north-west offshore and more broadly farther out in several inland directions, while the south and south-east remain peppered with secondary bright patches.
Compared with its surroundings, Oslo stands out clearly as the dominant source of skyglow in the area. Even so, the map also suggests that once you get beyond the densest cluster of lights, the sky can improve quite sharply compared with the inner city.
Looking straight up from the city
At the zenith, Oslo records 17.45 SQM, which corresponds to an inner-city sky with heavy skyglow overhead. Even looking straight up — away from the brightest horizon glow — the background sky remains bright enough to suppress a great deal of faint detail.
In practice, the familiar brighter constellations still come through, but with fewer stars filling in their patterns than you would see from a darker rural site. The Milky Way is generally lost, and subtle deep-sky objects struggle badly even when they are high in the sky.
This kind of overhead brightness is typical of a large capital city: usable for casual astronomy and bright showpiece targets, but limiting for anyone chasing faint structure or contrast.
north - fair
About 15 kilometres north of Oslo, the sky improves to Bortle 5, which is a fair step up from the city centre and can make brighter deep-sky targets more manageable. Genuinely dark skies are reachable in this direction at around 50 kilometres, where conditions reach Bortle 3.
north-north-east - marginal
Around 15 kilometres north-north-east of the city, conditions are still Bortle 6, so the sky remains noticeably affected by artificial light. Darker rural skies do arrive farther out, with Bortle 3 reached at about 100 kilometres.
north-east - marginal
At roughly 15 kilometres to the north-east, the sky is Bortle 6, giving only a modest improvement for visual observing. Better conditions continue to build with distance, and genuinely dark skies are reached at around 200 kilometres in this direction.
east-north-east - poor
Around 15 kilometres east-north-east of Oslo, the sky is still Bortle 8, so this is a poor direction for a quick escape from city glow. The improvement becomes much more noticeable farther out, with very dark conditions reached at about 100 kilometres.
east - marginal
About 15 kilometres east of the city, conditions are Bortle 6, so the sky is still fairly bright but improved from the centre. A much stronger step up appears farther out, with very dark skies reached at around 100 kilometres.
east-south-east - marginal
At around 15 kilometres east-south-east, the sky is Bortle 6, which is marginal for anything faint but workable for brighter targets. Genuinely dark skies are available by about 50 kilometres in this direction, where conditions improve to Bortle 3.
south-east - marginal
Around 15 kilometres south-east of Oslo, the sky remains Bortle 6, so there is some improvement but not a dramatic one. Much darker conditions are available farther out, with very dark skies appearing at about 100 kilometres.
south-south-east - poor
About 15 kilometres south-south-east of the city, the sky is still Bortle 7, making this a poor direction for a quick observing run. There is improvement with distance, but genuinely dark skies are not reached within the sampled range in this direction.
south - marginal
At roughly 15 kilometres south, the sky is Bortle 6, so brighter targets remain the most reliable. Darker conditions do turn up farther out, with Bortle 3 skies reached at around 100 kilometres.
south-south-west - marginal
Around 15 kilometres south-south-west of Oslo, the sky is Bortle 6, offering only a limited gain over the city centre. Really dark conditions require a much longer journey here, with Bortle 2 reached only at about 200 kilometres.
south-west - marginal
About 15 kilometres south-west of the city, the sky is Bortle 6, so the urban glow is still very much present. This direction does improve with distance, but very dark skies do not arrive until around 200 kilometres out.
west-south-west - poor
At around 15 kilometres west-south-west, conditions are still Bortle 7, so this remains a poor nearby direction for serious stargazing. A substantial improvement appears farther out, with Bortle 3 skies reached at about 100 kilometres.
west - poor
Around 15 kilometres west of Oslo, the sky is Bortle 7, so city glow remains intrusive for most faint targets. Conditions improve meaningfully with distance, reaching very dark Bortle 2 skies at around 100 kilometres.
west-north-west - marginal
About 15 kilometres west-north-west of the city, the sky is Bortle 6, which is marginal but noticeably better than central Oslo. Darker skies are relatively accessible in this direction, with Bortle 3 reached at around 50 kilometres.
north-west - fair
At roughly 15 kilometres north-west, the sky reaches Bortle 5, making this one of the better quick-drive directions from Oslo. It improves further with distance, with very dark skies available at around 100 kilometres.
north-north-west - fair
Around 15 kilometres north-north-west of the city, the sky is Bortle 5, so this is a fairly promising direction for a modest improvement. Much darker conditions can be found farther out, with very dark skies reached at about 100 kilometres.
zenith - poor
Looking straight up from Oslo, the zenith is Bortle 9, so the overhead sky remains strongly brightened by the city’s light dome. The brighter constellations are still recognisable, but many of their fainter stars are lost and the Milky Way is generally not visible from the city centre.
-
Near Fyresdal, Norway
- Direction
- SW
- Distance (km)
- 187.6
- SQM
- 21.46
- Bortle
- 3
Milky Way visible, broadband DSO imaging
-
Near Hurdal, Norway
- Direction
- ENE
- Distance (km)
- 56.2
- SQM
- 21.11
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
-
Near Larvik, Norway
- Direction
- SW
- Distance (km)
- 75.1
- SQM
- 21.04
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
Genuinely dark skies are not available right beside Oslo, but worthwhile improvement is achievable with a moderate drive. The nearest reasonable dark-sky option is about 55 kilometres east-north-east, at Near Hurdal, Norway, where the sky reaches Bortle 4.
If you are prepared to go much farther, still darker conditions open up to the south-west at Near Fyresdal, Norway, with Bortle 3 skies around 190 kilometres from the city.
-
Within 100 km
- Place
- Near Hurdal, Norway
- Direction
- ENE
- Distance (km)
- 56.2
- SQM
- 21.11
- Bortle
- 4
-
Within 200 km
- Place
- Near Fyresdal, Norway
- Direction
- SW
- Distance (km)
- 187.6
- SQM
- 21.46
- Bortle
- 3
Long-term trend
Oslo’s long-term sky-brightness record shows a modest overall improvement. The earliest reading in the series was 16.65 SQM, while the latest stands at 17.45 SQM, a gain of 0.80 SQM across 76 datasets.
The fitted trend is positive at roughly 0.0539 SQM per year, which points to a gradual darkening rather than a worsening sky. Even so, the city remains firmly in very bright urban territory overall, so this improvement is helpful but not transformative for observers within Oslo itself.
The historical range is wide, from a minimum of 16.65 SQM to a maximum of 22.00 SQM, suggesting that conditions across the full record have varied substantially.
From within Oslo itself, the best targets are the bright, high-contrast ones that can push through heavy skyglow. The Moon and planets are obvious choices, while double stars and the brightest open clusters can still be rewarding in a small telescope.
A handful of brighter deep-sky showpieces may still be possible with patience and careful observing, especially when they are high above the horizon. Even so, faint galaxies, large nebulae and subtle Milky Way detail are far better saved for a darker site outside the city.
If you can drive out to a darker location, Oslo’s options broaden dramatically. That is where deep-sky observing, wide-field astrophotography and meteor watching become much more satisfying.
- Moon
- planets
- double stars
- brightest open clusters
- bright nebulae such as M42
- the brightest globular clusters
- Milky Way
- faint galaxies
- broadband nebulae
- meteor showers
Can you see stars from Oslo?
Yes — you can still see stars from Oslo, especially the brighter constellations and the most prominent individual stars. However, the city’s heavy light pollution removes many fainter stars that would be obvious from a darker location.
Can you see the Milky Way from Oslo?
From the city itself, the Milky Way is generally not visible. Oslo’s central sky brightness is simply too high for its faint band and structure to stand out.
What Bortle class is Oslo?
Oslo is Bortle 9 in the city-centre data here, which is the brightest end of the urban sky scale. In practical terms, that means strong skyglow and a big reduction in faint celestial detail.
What is the SQM in Oslo?
The measured sky brightness for Oslo is 17.45 SQM. That is a bright inner-city reading, consistent with a heavily light-polluted capital.
Where are the nearest dark skies to Oslo?
The nearest reasonable dark-sky improvement listed here is Near Hurdal, Norway, about 56.2 kilometres east-north-east of the city, where conditions reach Bortle 4. For darker still skies, Near Fyresdal, Norway offers Bortle 3 conditions at 187.6 kilometres to the south-west.
Is Oslo good for astrophotography?
For lunar and planetary imaging, yes — Oslo works perfectly well because those targets are bright. For wide-field nightscapes, Milky Way shots and faint deep-sky imaging, you will get much better results by travelling outside the city to darker skies.
How far do you need to drive from Oslo for better stargazing?
A worthwhile improvement begins at about 56.2 kilometres, where Near Hurdal, Norway reaches Bortle 4. If you want a more clearly dark rural sky, the best listed option is farther afield at Near Fyresdal, Norway, 187.6 kilometres away.