THE BORTLE SCALE

from 1

        in which we are bathed
in airglow and gegenschein
our shadows cast by galactic
and zodiacal light
a dark that is not lonely
but immense and truly black
a blazing intimate night

to 9

        our own brazen and
banishing flood   Las Vegas
the brightest star in this thick
and sodium-orange sea
only the moon to watch now
as blithely we turn our backs
upon heaven’s company