Awkward and angular looking, Apollo 17's lunar module Challenger was designed for flight in the vacuum of space.
This picture from command module America, shows Challenger's ascent stage in lunar orbit.
The hatch allowing access to the lunar surface is seen at the front, with a round radar antenna at the top.
Mission commander Gene Cernan is just visible through the dark, triangular window. This spaceship performed gracefully, landing on the Moon and returning the Apollo astronauts to the orbiting command module in December 1972.
The Challenger's descent stage remains at the Apollo 17 landing site, Taurus-Littrow. The ascent stage was intentionally crashed nearby after being jettisoned from the command module prior to the astronauts' return to planet Earth.