to find planet Earth's darkest night skies led to this
In projection, the mosaic view sandwiches the horizons visible
from the northern hemisphere's Canary Island of La Palma (top)
and the south's high Atacama Desert
between the two hemispheres of the Milky Way Galaxy.
The photographers' choice of locations offered locally dark skies enjoyed
by La Palma's
los Muchachos Observatory and
But it also allowed the directions to
Milky Way's north
and south galactic poles to be placed near the local zenith.
That constrained the faint, diffuse glow of the plane of the
Milky Way to the mountainous horizons.
As a result, an even fainter S-shaped band of light, sunlight
by dust along the solar system's
can be completely traced through both northern and southern
hemisphere night skies.
Tunç Tezel and