Astronomy news update from NASA :
How far are you from a naturally dark night sky? In increasing steps, this world map (
medium |
large) shows the effect of artificial night sky brightness on the
visual appearance of the night sky. The brightness was modeled using high resolution
satellite data and fit to thousands of night sky brightness measurements
in recent work. Color-coded levels are compared to the natural sky brightness level for your location. For example, artificial sky brightness levels in yellow alter the natural appearance of the night sky. In red they
hide the Milky Way in an
artificial luminous fog. The results indicate that the historically common appearance of our galaxy at night is now lost for more than one-third of humanity. That includes 60% of Europeans and almost 80% of North Americans, along with inhabitants of other densely
populated, light-polluted regions
of planet Earth.
from NASA http://ift.tt/2970a3C
via
IFTTT
