St Helens Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.63

Bortle class

Class 8 (Class 8)

Darkness Quotient

29%

Dataset

April 2026

City sky

St Helens: The Practical Verdict

St Helens, a small city within the Liverpool City Region, experiences high light pollution, making it a challenging place for stargazing. With the Milky Way completely obscured by the sky glow, the overall astronomical quality here is categorised as poor city sky.

From this location, observing is best focused on bright celestial objects like the Moon, planets, and double stars. While some narrowband imaging can be attempted with care, deep-sky visual observing and widefield astrophotography are largely unfeasible due to the low contrast caused by the urban environment.

For seeking darker skies, Little London in the north-west offers a significantly better viewing experience as a Bortle 3 site. This site, within a longer drive, represents a vast improvement for deep-sky enthusiasts.

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

Little London sits about 146 km north west and reaches Bortle 3, roughly 14x darker.

Moderate dark window

St Helens's limiting factor is not only light pollution. Around midsummer, St Helens loses true astronomical darkness entirely, so deep-sky observing and imaging are strongly seasonal. Plan serious sessions around the darker months.

Frequently Asked Questions

Can you see the Milky Way from St Helens?

No. St Helens is a Bortle Class 8 sky with SQM 18.63, 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 St Helens?

St Helens is Bortle Class 8 (SQM 18.63), a poor city sky for astronomy.

Is St Helens good for stargazing?

Not for serious deep-sky observing. St Helens is a poor city sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.

Is St Helens good for astrophotography?

Broadband deep-sky imaging is heavily compromised from St Helens and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from St Helens without careful processing.

What can you observe from St Helens?

Primary targets from St Helens 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 St Helens?

The closest meaningfully darker mapped site is Holt Green, about 15 km north west of St Helens, reaching Bortle 6.

When is the sky darkest in St Helens?

The sky over St Helens is darkest around January, December. Significant summer limitation: around 77 nights per year have no true astronomical darkness.

Is light pollution in St Helens getting better or worse?

Long-term light pollution over St Helens has been broadly stable across the available measurements.

• Holt Green

  Direction

  NW

  Distance (km)

  15.4

  SQM

  19.80

  Bortle

  6

• Llanllechid

  Direction

  WSW

  Distance (km)

  88.3

  SQM

  20.59

  Bortle

  5

• Little London

  Direction

  NW

  Distance (km)

  146.4

  SQM

  21.53

  Bortle

  3

• Whiston Eaves

  Direction

  SE

  Distance (km)

  72.2

  SQM

  19.95

  Bortle

  6

• Llangurig

  Direction

  SSW

  Distance (km)

  136.7

  SQM

  21.11

  Bortle

  4

• Buckabank

  Direction

  SSW

  Distance (km)

  155.4

  SQM

  21.23

  Bortle

  4