DESTINY LABORATORY MODULE
Installed: February, 2001 Cost: $1.38 billion
The Boeing-made module was transported into space aboard the shuttle Atlantis. Destiny is the most expensive piece of hardware on the International Space Station (ISS) and serves as the station's primary command-and-control centre. CANADARM2
Installed: April, 2001 Cost: $900 million
Following Sarnia, Ont., native Chris Hadfield's installation of the 17-metre-long arm, Canada gained access to 2.3% of the laboratory space in the non-Russian part of the ISS. COLUMBUS MODULE
Installed: Expected in late 2003 or early 2004 Cost: $670 million
Despite the British government's initial objections to the cost, the European Space Agency is committed to building the Columbus, a lab for medical and scientific experiments. SOLAR WINGS
Installed: December, 2000 Cost: $600 million
The blue-and-gold wings were placed into position by the deft robotic-arm manipulation of astronaut Marc Garneau, the first Canadian in space.
They comprise the largest structure ever deployed in space. ZVEZDA SERVICE MODULE
Installed: July, 2000 Cost: $320 million
Zvezda-"star" in Russian-was boosted into space on a Proton-K rocket emblazoned with a Pizza Hut logo. The cost for the ad: reportedly $1 million. UNITY
Installed: December, 1998 Cost: $300 million
An 11-metre passageway, Unity was the first U.S.-made piece to arrive at the station. It attached itself to the Russian module Zarya to form the foundation of the ISS construction project. ZARYA CONTROL MODULE
Installed: November, 1998 Cost: $240 million
The very first piece of the ISS-Zarya, or "sunrise" in Russian-shot into orbit from the Baikonur Cosmodrome in Kazakhstan. That's the same place where Sputnik I launched in 1957 and where Yuri Gagarin, the first human in space, blasted off in 1961. LEONARDO, RAFFAELLO AND DONATELLO
Installed: 2001 and 2004 Cost: $230 million
The three Italian modules serve as the station's moving vans, carrying around equipment, supplies and experiments. Leonardo went up first on the shuttle Discovery. Raffaello was part of the cargo of the recent Endeavour mission. Donatello is due to launch in 2004.