Brighton Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.97

Bortle class

Class 7 (Class 7)

Darkness Quotient

33%

Dataset

April 2026

Suburban/urban transition

Brighton: The Practical Verdict

Brighton, a coastal mid-size city in southern England, experiences significant sky brightness, characteristic of high light pollution areas. Observing conditions from here are markedly limited, with little opportunity for deep-sky astronomy.

The sky’s lack of darkness makes visual Milky Way observation impossible, and faint deep-sky objects are close to inaccessible. However, brighter targets such as the Moon, planets, and prominent double stars can be enjoyed. Narrowband imaging remains feasible for bright nebulae with careful effort, though broadband imaging struggles against the ambient glow.

For a meaningful improvement, Ewhurst, about 50 km east north-east, offers much darker skies under Bortle 4 conditions. This upgrade is essential for anyone looking to undertake serious astrophotography or deep-sky observing.

At a Glance

Overall

Poor urban/suburban sky - This is a poor sky for astronomy. The Moon, planets, and a few bright objects remain viable, but deep-sky work is difficult.

Milky Way

Not visible - The Milky Way is not realistically visible from this level of light pollution.

Best targets from here

Moon, planets, bright double stars, bright open clusters, narrowband imaging with careful processing

Do not prioritise

visual deep-sky observing, broadband galaxies, reflection nebulae, Milky Way photography

Best nearby upgrade

Ewhurst sits about 50 km east north east and reaches Bortle 4, roughly 5.4x darker.

Moderate dark window

Brighton'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 Brighton?

No. Brighton is a Bortle Class 7 sky with SQM 18.97, 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 Brighton?

Brighton is Bortle Class 7 (SQM 18.97), a poor urban/suburban sky for astronomy.

Is Brighton good for stargazing?

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

Is Brighton good for astrophotography?

Broadband deep-sky imaging is heavily compromised from Brighton and a Bortle 4 or darker site is strongly recommended. Narrowband imaging of bright emission nebulae remains viable from Brighton with appropriate Ha or OIII filters.

What can you observe from Brighton?

Primary targets from Brighton include Moon, planets, bright double stars, bright open clusters, narrowband imaging with careful processing. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.

Where are darker skies near Brighton?

The closest meaningfully darker mapped site is Ansty and Staplefield, about 25 km west of Brighton, reaching Bortle 6.

When is the sky darkest in Brighton?

The sky over Brighton is darkest around January, December. Significant summer limitation: around 52 nights per year have no true astronomical darkness.

Is light pollution in Brighton getting better or worse?

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

• Tedfold

  Direction

  NW

  Distance (km)

  30.4

  SQM

  20.42

  Bortle

  5

• Ewhurst

  Direction

  ENE

  Distance (km)

  49.7

  SQM

  20.80

  Bortle

  4

• Ansty and Staplefield

  Direction

  W

  Distance (km)

  24.5

  SQM

  20.09

  Bortle

  6

• West Ashling

  Direction

  W

  Distance (km)

  50

  SQM

  20.30

  Bortle

  5

• South Gorley

  Direction

  W

  Distance (km)

  114.8

  SQM

  20.78

  Bortle

  5