The Command Space Module engine fired for six minutes to slow the spacecraft enough to be captured by the moon’s gravity. Later they would burn the engine again to place them in a near circular orbit of 111 km (69 miles).

The next day, Armstrong and Aldrin transferred into the Lunar Module and separated from the Command Space Module. On the far side of the moon, they fired their descent engine for 30 seconds to place the Lunar Module at the desired 50,000 foot altitude at the appropriate spot 450km (280 miles) east of the landing site.

Apollo 11 Eagle after undocking.