Moonward bound

A soon-to-be lunar explorer takes a last look at Earth before entering orbit around the Moon. At a distance of only 3,000 miles the Moon nearly fills the field of view. Closing at a speed of 25,000 mph, the explorer will need to return to the airlock soon if she is to be safely inside before the thrusters file, slowing the tug/lunar lander combination down to an orbital velocity.