Explore sky quality across India and worldwide. Click anywhere to read VIIRS satellite radiance, Bortle scale class and SQM sky brightness. Major Indian metros — Delhi, Mumbai, Bengaluru, Kolkata, Chennai, Hyderabad — typically measure Bortle 8–9, while Hanle in Ladakh (India's first Dark Sky Reserve), Spiti Valley and the Rann of Kutch retain pristine Bortle 1–3 skies.
SkyQI combines 84,100 VIIRS satellite grid cells covering India with ground-truth readings contributed by citizen scientists.