SPACE.com Image Gallery: STS-116 Launch Day Gallery

STS-116 Launch Day Gallery

Preparations Underway

On the morning of the second launch attempt, Space Shuttle Discovery is revealed after the rotating service structure is rolled back. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the fixed service structure. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. Click to enlarge.

Photo credit: NASA/Ken Thornsley