Solis Lacus - L'oeil de Mars
Image Credit &
Copyright:
Damian Peach
As telescopes around planet Earth watch,
Mars is growing brighter in
night skies, approaching its 2020 opposition on October 13.
Mars looks like it's watching too in this view of
the Red Planet from September 22.
Mars' disk is already near its maximum apparent size for
earthbound telescopes,
less than 1/80th the apparent diameter of a Full Moon.
The seasonally shrinking south polar cap is at the bottom and
hazy northern clouds are at the top.
A circular, dark albedo feature, Solis Lacus (Lake of the Sun), is just
below and left of disk center.
Surrounded by a light area south of Valles Marineris, Solis Lacus
looks like a planet-sized pupil, famously known as
The Eye of Mars
.
Near the turn of the 20th century, astronomer and avid
Mars watcher Percival Lowell
associated the Eye of Mars with a conjunction of
canals he charted
in his drawings
of the Red Planet.
Broad, visible changes in the size and shape of the Eye of Mars
are now
understood
from high resolution surface images to be due to
dust transported by winds in the thin
Martian atmosphere.