Glendale Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.85

Bortle class

Class 9 (Class 9)

Darkness Quotient

22%

Dataset

April 2026

Inner city sky

Glendale: The Practical Verdict

Glendale, Arizona, situated just north-west of Phoenix, is a developed mid-sized city dominated by suburban settings. The level of light pollution here places it firmly in the category of high-light pollution skies, rendering it unsuitable for deep-sky or wide-field Milky Way observations.

Under Glendale's sky, visual observation is largely restricted to the brightest celestial objects such as the Moon, planets, and brighter stars. While narrowband imaging is possible with careful setup, broadband deep-sky imaging efforts would suffer significantly from the overwhelming urban skyglow. The directional asymmetry shows the north-west sky to be relatively cleaner compared to the south-east, which is affected by Phoenix's noticeable light dome.

For those seeking a significant improvement in observing conditions, Altar, Sonora, located roughly 265 km to the south, offers a much darker site suitable for serious astronomical observations, including deep-sky targets.

At a Glance

Overall

Severe urban sky - This is a severely light-polluted urban sky. Only the Moon, planets, bright stars, and a few specialist targets remain practical.

Milky Way

Not visible - The Milky Way is not visible from this sky.

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

Altar, Sonora sits about 267 km south and reaches Bortle 3, roughly 27x darker.

Good dark window

Glendale'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 Glendale?

No. Glendale is a Bortle Class 9 sky with SQM 17.85, 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 Glendale?

Glendale is Bortle Class 9 (SQM 17.85), a severe urban sky for astronomy.

Is Glendale good for stargazing?

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

Is Glendale good for astrophotography?

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

What can you observe from Glendale?

Primary targets from Glendale 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 Glendale?

The closest meaningfully darker mapped site is Casa Grande, Arizona, about 88 km south south east of Glendale, reaching Bortle 6.

When is the sky darkest in Glendale?

The sky over Glendale is darkest around January, December.

Is light pollution in Glendale getting better or worse?

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

• Casa Grande, Arizona

  Direction

  SSE

  Distance (km)

  88.4

  SQM

  19.74

  Bortle

  6

• Yuma County, Arizona

  Direction

  SW

  Distance (km)

  159.5

  SQM

  21.03

  Bortle

  4

• Altar, Sonora

  Direction

  S

  Distance (km)

  267.1

  SQM

  21.43

  Bortle

  3