Endeavour departs Kennedy Space Center for the final time in this image captured by Zero-G News photographer Mike Killian.
NASA's Amazing Daily Image
Chasma Boreale and North Polar Ice Cap of Mars
Mars has bright polar caps of ice that are easily visible from telescopes on Earth. A seasonal cover of carbon-dioxide ice and snow is observed to advance and retreat over the poles during the Martian year. Scientists using radar data have found a record of the most recent Martian ice age recorded in the north polar ice cap. Read More