Approaching winter, Mars

Approaching winter, Mars

“Deep shadows create dramatic contrasts between light and dark in this
high-resolution close-up of the martian surface. Recorded on January
24 by the HiRISE camera onboard the Mars Reconnaissance Orbiter, the
scene spans about 1.5 kilometers across a sand dune field in a
southern highlands crater. Captured when the Sun was just 5 degrees
above the local horizon, only the dune crests are caught in full
sunlight. With the long, cold winter approaching the red planet’s
southern hemisphere, bright ridges of seasonal frost line the martian
dunes.” – from Astronomy Picture of the Day