Where did the stars go? How India's cities are dimming the twinkle in our skies

There was a time when stepping outside after dinner and merely looking up was enough to witness the universe in all its glory.As your eyes adjusted to the darkness, constellations would emerge one by one. The Milky Way would slowly appear as a hazy band across the sky. On exceptionally clear nights, there could be so many stars that the sky seemed almost crowded.But for millions of urban Indians today, that experience is nearly impossible.Look up at the night sky and you may notice something unsettling: there is almost nothing to see. A handful of stars. Perhaps a bright planet.