Then and now: crew modules for lunar missions

Photo montage. On the left, the spacecraft for Apollo 10, with its Command and Service Modules attached, is moved to a work stand for mating to a lunar module adapter. This spacecraft was flown on the fourth crewed mission for the Apollo Program.

To the right is the Orion spacecraft being lifted out of a processing work stand and onto a transporter. While the two spacecraft may look similar, Orion is larger and can fit more crew members than Apollo. The spacecraft is also much more technologically advanced.  (Credit: NASA)