Austin, TX — light pollution & stargazing across the metro
The Austin, TX light dome covers 15 towns and about 1,547,522 people rated together, reading roughly Bortle 9 — a inner-city sky (very poor — city glow) — at Austin itself, measured from VIIRS 2024 satellite night-lights. The darkest edge of this same dome is Lakeway, about 16 mi out, at roughly Bortle 5. The nearest certified dark-sky destination is Dripping Springs, about 21 mi away. Tonight's Moon phase, cloud cover, and aurora odds load live below, computed in your browser.
Stargazing at the Austin core tonight
- Estimated Bortle class (core)
- 9 of 9
- VIIRS radiance (core)
- 111 nW/cm²/sr
- Naked-eye limiting mag. (core)
- under 4.1
- Darkest edge of this dome
- Lakeway · B5 · 16 mi
Inner-city sky.
What you can see from the Austin core
Only the Moon, the bright planets, and a scattering of the very brightest stars pierce the glow. For real stargazing you'll want to drive to a darker site.
At an estimated Bortle 9, the faintest stars visible from Austin itself on a clear, moonless night run to about magnitude 4.0 or brighter, and the Milky Way is not visible. Lakeway is a regional drive away (16 mi) and improves to roughly Bortle 5.
Of the 15 towns rated in this dome, most read Bortle 7 (7 towns) — spread across 5 darkness classes overall. Beyond Austin itself, Round Rock, Cedar Park, Georgetown round out the largest towns sharing this same light dome.
The sky from 30.3°N
Declination above +59.7° never sets here, and below −59.7° never rises — no matter how clear the night or how long you wait.
- Never sets: Polaris, the Big Dipper
- Never rises: Alpha Centauri, the Southern Cross
- Skims the southern horizon: Canopus (peaks 7° up)
- Milky Way core: culminates 30.7° above the southern horizon — it rides high in the south in summer, which is about as good as the core gets from the United States.
- Longest night: 13 h 57 m at the December solstice, 10 h 03 m in June.
- Midsummer: the Sun reaches only 36.3° below the horizon at solar midnight in June — past the 18° astronomical-night mark.
Geometric, from 30.267°N, 97.743°W. How these are computed.
Every town in this light dome, darkest first
All 15 towns inside Austin's ~35-mile dome, each with its own measured reading.
| Town | State | Bortle | Sky | Radiance |
|---|---|---|---|---|
| Lakeway | TX | 5 | Suburban sky | 7.0 |
| Brushy Creek | TX | 6 | Bright suburban sky | 13 |
| Buda | TX | 6 | Bright suburban sky | 14 |
| Kyle | TX | 6 | Bright suburban sky | 20 |
| Hutto | TX | 6 | Bright suburban sky | 20 |
| Pflugerville | TX | 7 | Suburban / urban transition | 21 |
| Taylor | TX | 7 | Suburban / urban transition | 23 |
| Wells Branch | TX | 7 | Suburban / urban transition | 23 |
| Leander | TX | 7 | Suburban / urban transition | 26 |
| Georgetown | TX | 7 | Suburban / urban transition | 33 |
| Cedar Park | TX | 7 | Suburban / urban transition | 34 |
| Lockhart | TX | 7 | Suburban / urban transition | 35 |
| San Marcos | TX | 8 | City sky | 40 |
| Round Rock | TX | 8 | City sky | 55 |
| Austin | TX | 9 | Inner-city sky | 111 |
Certified dark-sky destinations near Austin
| Place | Designation | Distance |
|---|---|---|
| Dripping Springs | Dark Sky Community | 21 mi |
| Horseshoe Bay | Dark Sky Community | 42 mi |
| Enchanted Rock State Natural Area | Dark Sky Park | 66 mi |
| South Llano River State Park | Dark Sky Park | 125 mi |
| Devils River State Natural Area | Dark Sky Sanctuary | 195 mi |
Other light domes near Austin
Houston, TX (145 mi, core Bortle 9) , Dallas, TX (180 mi, core Bortle 9) , and New Orleans, LA (460 mi, core Bortle 9) are the closest other metro-scale domes tracked here — each with its own core reading and its own darkest edge.
Frequently asked questions
- Can you see the Milky Way from Austin?
- Not from Austin itself — at about Bortle 9 the dome is too bright. The darkest edge of the same metro is Lakeway, about 16 mi out at roughly Bortle 5, or drive to the certified Dripping Springs (21 mi) for a genuinely dark sky.
- How dark is the sky across the Austin metro?
- It varies by how close you are to the core. Austin itself reads about Bortle 9; the 15 towns in this light dome range down to Lakeway at roughly Bortle 5, about 16 mi from the core. The table above sorts every town in the metro by measured darkness.
- Where's the nearest certified dark-sky destination to Austin?
- Dripping Springs (Dark Sky Community), about 21 mi away.
A satellite proxy, not a survey-grade reading. Sources and limits.
More in Texas
All Texas towns · Bortle scale · Tonight's Moon · Dark-sky map