... Approaching the International Space Station . ... Credit: STS-106 Crew , NASA Explanation: Last Monday the crew of Space Shuttle Atlantis took in this view as they approached the developing International Space Station (ISS). From top to bottom, the astronauts saw a station currently consisting of the Progress supply module, the Zvezda service module , the Zarya cargo module , and the Unity connecting module . ... The Shuttle and its entire crew are scheduled to return to Earth Wednesday. ...