Exeter Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.51

Bortle class

Class 7 (Class 7)

Darkness Quotient

40%

Dataset

May 2026

Suburban/urban transition

Exeter: The Practical Verdict

Exeter, a small city in Devon, features a challenging stargazing environment due to high light pollution. The urban sky quality is poor for observing, characterised by a Bortle Class 7 rating. This makes detailed deep-sky observation difficult as the Milky Way is not visible.

From Exeter, stargazing is primarily limited to bright targets such as the Moon, planets, and double stars. Narrowband imaging methods can still be applied to bright nebulae, but this requires meticulous processing. Deep-sky objects like galaxies and faint nebulae remain largely inaccessible from within the city limits.

The best nearby upgrade for substantial improvement is Bishop's Nympton, around 35 km north-north-west, which offers much superior conditions with a Bortle Class 3 rating. Serious deep-sky observers would benefit from visiting this location, where skies are noticeably darker.

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

Bishop's Nympton sits about 34 km north north west and reaches Bortle 3, roughly 6.3x darker.

Moderate dark window

Exeter'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 Exeter?

No. Exeter is a Bortle Class 7 sky with SQM 19.51, 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 Exeter?

Exeter is Bortle Class 7 (SQM 19.51), a poor urban/suburban sky for astronomy.

Is Exeter good for stargazing?

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

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

What can you observe from Exeter?

Primary targets from Exeter 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 Exeter?

The closest meaningfully darker mapped site is Holcombe Down, about 17 km south of Exeter, reaching Bortle 5.

When is the sky darkest in Exeter?

The sky over Exeter is darkest around January, December. Significant summer limitation: around 51 nights per year have no true astronomical darkness.

Is light pollution in Exeter getting better or worse?

The long-term trend for Exeter is gradually improving, with the sky darkening by about 0.05 SQM per year.

• Bishop's Nympton

  Direction

  NNW

  Distance (km)

  34

  SQM

  21.51

  Bortle

  3

• Oakford Bridge

  Direction

  ESE

  Distance (km)

  30.9

  SQM

  21.36

  Bortle

  3

• Iddesleigh

  Direction

  WNW

  Distance (km)

  36.4

  SQM

  21.45

  Bortle

  3

• Holcombe Down

  Direction

  S

  Distance (km)

  16.7

  SQM

  20.73

  Bortle

  5

• Memory Cross

  Direction

  SSW

  Distance (km)

  29.1

  SQM

  21.09

  Bortle

  4

• Milton Abbot

  Direction

  WSW

  Distance (km)

  53.8

  SQM

  21.41

  Bortle

  3