Crawley Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.12

Bortle class

Class 7 (Class 7)

Darkness Quotient

35%

Dataset

August 2026

Suburban/urban transition

Crawley: The Practical Verdict

Crawley is a small city with a suburban feel, situated in the high light pollution zone. The skies here are marked by poor urban and suburban visibility. The overpowering light pollution means that the Milky Way is not visible from within Crawley, and serious deep-sky observation requires relocating.

From this light-polluted setting, stargazers can enjoy bright objects such as the Moon, planets, and double stars. Narrowband imaging, though challenging, is viable with bright emission nebulae, but broadband deep-sky imaging is not ideal here. The brightest skies lie to the north, courtesy of London’s formidable light dome, while the horizon to the east-south-east offers a cleaner view.

For those looking to marginally improve their stargazing conditions, a nearby spot about 30 km to the south-east offers a modest upgrade in darkness, though it remains hampered by some degree of light pollution. No nearby site provides a dramatic reduction in sky brightness, but these options offer some relief from Crawley’s urban glow.

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

30 km SE is the strongest nearby option but remains Bortle 5; the improvement is real but modest.

Moderate dark window

Crawley'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 Crawley?

No. Crawley is a Bortle Class 7 sky with SQM 19.12, 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 Crawley?

Crawley is Bortle Class 7 (SQM 19.12), a poor urban/suburban sky for astronomy.

Is Crawley good for stargazing?

Not for serious deep-sky observing. Crawley 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 Crawley good for astrophotography?

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

What can you observe from Crawley?

Primary targets from Crawley 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 Crawley?

The closest meaningfully darker mapped site is 19 km SSW, about 19 km south south west of Crawley, reaching Bortle 5.

When is the sky darkest in Crawley?

The sky over Crawley is darkest around January, December. Significant summer limitation: around 55 nights per year have no true astronomical darkness.

Is light pollution in Crawley getting better or worse?

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

• 19 km SSW

  Direction

  SSW

  Distance (km)

  19.4

  SQM

  20.57

  Bortle

  5

• 30 km SE

  Direction

  SE

  Distance (km)

  29.8

  SQM

  20.78

  Bortle

  5

• 32 km SW

  Direction

  SW

  Distance (km)

  31.9

  SQM

  20.43

  Bortle

  5

• 48 km E

  Direction

  E

  Distance (km)

  47.6

  SQM

  20.72

  Bortle

  5

• 17 km ESE

  Direction

  ESE

  Distance (km)

  16.8

  SQM

  19.71

  Bortle

  6