杏吧原创

Milky Way obscured by light pollution for a third of the world

A new map of global light pollution reveals that a third of the world's population can't see our galaxy at night
milky way
A rare sight
Carlos Fernandez/Getty

SEEING stars is getting harder. A third of us can鈥檛 see the Milky Way at night, according to a new map of light pollution across the globe.

Around 80 per cent of the world鈥檚 population lives under skies obscured to some degree by human-made light. Singapore never experiences true night conditions 鈥 artificial twilight masks the darkness. Chad, the Central African Republic and Madagascar have the lowest levels of light pollution, with three-quarters of their populations enjoying pristine night skies.

The Milky Way, visible in darkness as a dim glow streaking across the sky, is hidden for 60 per cent of Europeans and 80 per cent of North Americans.

鈥淚t鈥檚 a big part of our connection to the cosmos 鈥 and it鈥檚 been lost,鈥 says study author Chris Elvidge of the US National Oceanic and Atmospheric Administration, who built the map using satellite images, computer models and citizen-science measurements from the ground (Science Advances, ).

This article appeared in print under the headline 鈥淢ilky where?鈥

Topics: Astronomy / Stars