Stargazing guide
Stargazing in Lang Son, Lạng Sơn Province, Vietnam
Lang Son, Lạng Sơn Province, Vietnam has an estimated Bortle 4–5 sky (small city). The Milky Way core is highest after dark in April, at about 39°.
How dark the sky is around Lang Son, Lạng Sơn Province, Vietnam, the nearest certified dark-sky places, when the Milky Way core is visible, and the next dark New Moon. Calculated for 21.85°, 106.76°.
Estimated sky glow
Milky Way core
Next New Moon
Dark-sky rating for Lang Son
Lang Son, Lạng Sơn Province, Vietnam is a small city (population about 200,108). A place this size typically has a rural to suburban transition: the Milky Way core can be glimpsed on clear, moonless nights. That is an estimate of Bortle class 4–5 from population, not a measurement: the real value depends on the exact spot you observe from.
For a measured reading at any point, open the live Dark Sky map.
Nearest dark-sky places and observatories
No certified dark-sky place or observatory in our registry lies within 150 km of Lang Son. Our list only includes genuine, publicly documented sites, so none is shown rather than guessed.
Milky Way season in Lang Son
The bright core of the Milky Way climbs high above the horizon haze. It climbs at least 20° above the horizon during astronomical darkness in February, March, April, May, June, July, August, September, October, peaking in April at about 39°.
- The north celestial pole stands 21.9° above the horizon, so stars within 22° of it never set from here.
- About 68.6% of the whole sky rises above the horizon at some point in the year from this latitude.
- The Milky Way's core in Sagittarius culminates about 39.1° up, clearing the horizon haze comfortably.
- At 265 m elevation, roughly 3% of the atmosphere's mass is already below you, which measurably reduces extinction near the horizon.
Tonight and aurora
As of October 19, 2026 (UTC) the Moon is a Waxing Gibbous at 61% illumination. Aurora at 21.9° latitude generally needs about Kp 9.0.
Nearby places
Stargazing in Lang Son: common questions
Is Lang Son a good place for stargazing?
Lang Son, Lạng Sơn Province, Vietnam is a small city, so its typical sky is rural to suburban transition: the Milky Way core can be glimpsed on clear, moonless nights (an estimate of Bortle 4–5 from population, not a measurement). No certified dark-sky place or observatory in our registry lies within 150 km, so a dark site means driving away from the city's glow toward the darkest horizon you can reach.
When can you see the Milky Way from Lang Son?
From Lang Son, Lạng Sơn Province, Vietnam (21.85°, 106.76°) the Milky Way's bright core climbs at least 20° above the horizon during astronomical darkness in February, March, April, May, June, July, August, September, October. It peaks in April, reaching about 39°. Moonlight, cloud and city lights still decide what you actually see.
What is the best night this month for stargazing near Lang Son?
The darkest nights fall around the New Moon. As of 2026-10-19 the Moon is a Waxing Gibbous at 61% illumination, and the next New Moon is November 9, 2026 (UTC). Pair it with a clear forecast and a site away from town lights.