Prague Stargazing & Astronomy Report
Light pollution and stargazing locations near Prague
- City
- Prague
- Country
- Czech Republic
- Latitude
- 50.0755
- Longitude
- 14.4378
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 18.21
- Bortle class
- Class 8 (Class 8)
- Darkness Quotient
- 25%
- Dataset
- August 2026
City sky
Prague: The Practical Verdict
Prague is the capital city of the Czech Republic and a major urban area with significant light pollution. The overall sky quality here is poor for serious astronomical observation, as confirmed by its classification as a Bortle 8 city sky. The primary limiting factor is the high level of light pollution, which washes out most night-sky details.
Under Prague's bright skies, your best bets are observing targets such as the Moon, planets, bright stars, and solar system events. The harsh light environment significantly diminishes any chance of visual deep-sky observing, and faint objects like reflection nebulae or galaxies are overwhelmed. Narrowband imaging is possible with caution but offers limited satisfaction. The Milky Way is entirely invisible.
For a better observing experience, it is worth considering a trip to Bosna in the South Bohemian Region, approximately 110 kilometers south south east of Prague. This site offers a Bortle 4 sky, providing a much needed upgrade for deep-sky astronomy endeavours.
At a Glance
- Overall
- Poor city sky - This is a poor city sky. The Milky Way is not visible and most deep-sky observing is unrealistic from the location itself.
- Milky Way
- Not visible - The Milky Way is erased by the bright urban sky background.
- Best targets from here
- Moon, planets, bright stars, double stars, solar system events, narrowband imaging only with care
- Do not prioritise
- visual deep-sky observing, broadband galaxies, reflection nebulae, widefield Milky Way
- Best nearby upgrade
- Bosna, South Bohemian Region sits about 112 km south south east and reaches Bortle 4, roughly 14x darker.
- Moderate dark window
- Prague's longest dark windows fall in December and January, with the shortest nights around June and July. Plan deep-sky sessions around the autumn and winter months for the best combination of long nights and true astronomical darkness.
Frequently Asked Questions
Can you see the Milky Way from Prague?
No. Prague is a Bortle Class 8 sky with SQM 18.21, so the Milky Way is not visible from the city. For Milky Way photography, look for a Bortle 4 or darker site.
What Bortle class is Prague?
Prague is Bortle Class 8 (SQM 18.21), a poor city sky for astronomy.
Is Prague good for stargazing?
Not for serious deep-sky observing. Prague is a poor city sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Prague good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Prague and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Prague without careful processing.
What can you observe from Prague?
Primary targets from Prague include Moon, planets, bright stars, double stars, solar system events. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.
Where are darker skies near Prague?
The closest meaningfully darker mapped site is Lipany, about 14 km south east of Prague, reaching Bortle 7.
When is the sky darkest in Prague?
The sky over Prague is darkest around January, December. Significant summer limitation: around 42 nights per year have no true astronomical darkness.
Is light pollution in Prague getting better or worse?
Long-term light pollution over Prague has been broadly stable across the available measurements.
north - good
The north horizon is dark. Faint stars are visible close to the ground.
north-north-east - good
Dark horizon to the north-north-east. Faint stars and extended objects in this direction behave much as they do overhead.
north-east - good
The north-east horizon is dark. Faint stars are visible close to the ground.
east-north-east - fair
The east-north-east sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
east - fair
The east sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
east-south-east - fair
Faint glow on the east-south-east horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
south-east - fair
A faint diffuse glow on the south-east horizon. Stars are visible to low elevation, with minor losses near the ground.
south-south-east - good
No noticeable light pollution to the south-south-east. The sky in this direction is dark to the horizon.
south - good
The south sky is dark to the horizon. Faint targets are accessible at all elevations here.
south-south-west - good
Dark horizon to the south-south-west. Faint stars and extended objects in this direction behave much as they do overhead.
south-west - good
Dark horizon to the south-west. Faint stars and extended objects in this direction behave much as they do overhead.
west-south-west - fair
A faint diffuse glow on the west-south-west horizon. Stars are visible to low elevation, with minor losses near the ground.
west - fair
A faint diffuse glow on the west horizon. Stars are visible to low elevation, with minor losses near the ground.
west-north-west - fair
Faint glow on the west-north-west horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
north-west - good
The north-west sky is dark to the horizon. Faint targets are accessible at all elevations here.
north-north-west - good
The north-north-west horizon is dark. Faint stars are visible close to the ground.
zenith - marginal
The zenith sky is noticeably bright. Only the brighter members of each constellation are visible.
-
Lipí, Central Bohemian Region
- Direction
- SSW
- Distance (km)
- 33.5
- SQM
- 20.60
- Bortle
- 5
-
Lipany
- Direction
- SE
- Distance (km)
- 14.1
- SQM
- 19.54
- Bortle
- 7
-
Oldřichov v Hájích
- Direction
- NNE
- Distance (km)
- 96.1
- SQM
- 20.61
- Bortle
- 5
-
Bosna, South Bohemian Region
- Direction
- SSE
- Distance (km)
- 112.4
- SQM
- 21.05
- Bortle
- 4
-
Chlumek, Vysočina Region
- Direction
- SE
- Distance (km)
- 128.1
- SQM
- 20.91
- Bortle
- 4
-
Rychnov na Moravě, Pardubice Region
- Direction
- E
- Distance (km)
- 158.1
- SQM
- 20.90
- Bortle
- 4