Brighton Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.00

Bortle class

Class 7 (Class 7)

Darkness Quotient

33%

Dataset

August 2026

Suburban/urban transition

Brighton: The Practical Verdict

Brighton, a mid-size city in the United Kingdom, offers a typical suburban light-polluted sky, significantly affecting astronomical observing. With high light pollution, the overall stargazing quality is poor and the Milky Way is not visible. The brightest available targets are the Moon, planets, and bright double stars, requiring patience and skill to observe.

Within this urban environment, much of the deep-sky observing is curtailed, and any attempt at broadband galaxy observation is futile. Narrowband imaging may yield some results for bright nebulae with careful processing. For a more rewarding experience, Brighton's west horizon is notably brighter, while the south offers relatively clearer views.

Nearby sites such as Milton Street, 20 km east, provide a modest improvement in sky quality. Travel to these local spots offers potential for observing more targets without venturing too far from the city. However, the difference is not substantial enough to dramatically alter observing opportunities.

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

Limited nearby upgrade

Milton Street is the strongest nearby option but remains Bortle 5; the improvement is real but modest.

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 19.00, 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 19.00), 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 Milton Street, about 21 km east of Brighton, reaching Bortle 5.

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.

• Milton Street

  Direction

  E

  Distance (km)

  21

  SQM

  20.56

  Bortle

  5

• Forest Row

  Direction

  NNE

  Distance (km)

  33.6

  SQM

  20.18

  Bortle

  6

• Sandhurst

  Direction

  ENE

  Distance (km)

  53.1

  SQM

  20.59

  Bortle

  5

• Abinger

  Direction

  NW

  Distance (km)

  42.8

  SQM

  20.10

  Bortle

  6

• Overton

  Direction

  NW

  Distance (km)

  92.7

  SQM

  20.66

  Bortle

  5