Goiânia Stargazing & Astronomy Report
Light pollution and stargazing locations near Goiânia
- City
- Goiânia
- Country
- Brazil
- Latitude
- -16.6869
- Longitude
- -49.2648
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 17.92
- Bortle class
- Class 9 (Class 9)
- Darkness Quotient
- 22%
- Dataset
- May 2026
Inner city sky
Goiânia: The Practical Verdict
Goiânia, a major city in Goiás, is marked by significant urban development contributing to high levels of light pollution. With a severe urban sky, stargazing here is heavily restricted. The overall darkness quotient places the city under high light pollution, significantly constraining any deep-sky observing.
Under such conditions, celestial viewing is largely limited to the brightest nighttime targets. Observers can focus on the Moon, planets, and bright star clusters, whilst employing narrowband imaging with care to capture the brightest nebulae. However, visual deep-sky objectives and widefield Milky Way views are implausible.
For those willing to drive a bit, Piracanjuba in Goiás to the south-east offers a modest enhancement in sky quality, with Bortle 5 conditions about 65 km away.
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
- Limited nearby upgrade
- Piracanjuba, Goiás is the strongest nearby option but remains Bortle 5; the improvement is real but modest.
- Good dark window
- Goiânia retains astronomical darkness throughout the year, so seasonality is less extreme than at higher latitudes. The main limitation is light pollution, not the length of the dark window.
Frequently Asked Questions
Can you see the Milky Way from Goiânia?
No. Goiânia is a Bortle Class 9 sky with SQM 17.92, 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 Goiânia?
Goiânia is Bortle Class 9 (SQM 17.92), a severe urban sky for astronomy.
Is Goiânia good for stargazing?
Not for serious deep-sky observing. Goiânia is a severe urban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Goiânia good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Goiânia and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Goiânia without careful processing.
What can you observe from Goiânia?
Primary targets from Goiânia 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 Goiânia?
The closest meaningfully darker mapped site is Brazabrantes, Goiás, about 28 km west of Goiânia, reaching Bortle 7.
When is the sky darkest in Goiânia?
The sky over Goiânia is darkest around June, July.
Is light pollution in Goiânia getting better or worse?
Long-term light pollution over Goiânia has been broadly stable across the available measurements.
north - fair
Faint glow on the north horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
north-north-east - good
The north-north-east sky is dark to the horizon. Faint targets are accessible at all elevations here.
north-east - good
The north-east horizon is dark. Faint stars are visible close to the ground.
east-north-east - fair
The east-north-east sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
east - marginal
Noticeable glow on the east horizon. Stars below about 20 degrees in this direction are dimmed.
east-south-east - fair
Faint glow on the east-south-east horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
south-east - fair
A faint diffuse glow on the south-east horizon. Stars are visible to low elevation, with minor losses near the ground.
south-south-east - fair
Faint glow on the south-south-east horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
south - marginal
Soft skyglow visible on the south horizon. Mid-brightness stars survive at low elevation; the faintest do not.
south-south-west - marginal
Soft skyglow visible on the south-south-west horizon. Mid-brightness stars survive at low elevation; the faintest do not.
south-west - marginal
The south-west lower sky is measurably brighter than the darker quarters. Limit faint work to above about 20 degrees here.
west-south-west - fair
A faint diffuse glow on the west-south-west horizon. Stars are visible to low elevation, with minor losses near the ground.
west - fair
A trace of skyglow near the west horizon. Stars are clear throughout this direction except very close to the ground.
west-north-west - marginal
Noticeable glow on the west-north-west horizon. Stars below about 20 degrees in this direction are dimmed.
north-west - fair
A trace of skyglow near the north-west horizon. Stars are clear throughout this direction except very close to the ground.
north-north-west - fair
The north-north-west sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
zenith - poor
The zenith sky background is high. Most faint stars are absent and the Milky Way cannot be seen.
-
Brazabrantes, Goiás
- Direction
- W
- Distance (km)
- 27.5
- SQM
- 19.48
- Bortle
- 7
-
Piracanjuba, Goiás
- Direction
- SE
- Distance (km)
- 62.5
- SQM
- 20.36
- Bortle
- 5
-
Palmeiras de Goiás, Goiás
- Direction
- W
- Distance (km)
- 67.1
- SQM
- 19.93
- Bortle
- 6