It's actually not used in space shuttle windows. Aluminum and polycarbonate have very different thermal expansion rates so the polycarbonate windows would crack as they cool off when the space shuttle goes accross the dark side of the earth.
The space shuttle's structure is primarily made of aluminum alloy and titanium. The thermal protection system, which shields the shuttle from the intense heat of re-entry, is composed of materials such as reinforced carbon-carbon and silica tiles. Additionally, the shuttle's windows are made of multiple layers of materials including polycarbonate and glass.
Lenses made from polycarbonate, the same type of plastic used for the space shuttle windshield, are about 50 times stronger than other lens materials.
The outer layer of a space shuttle is typically made of reinforced carbon-carbon and thermal protection tiles. The reinforced carbon-carbon helps protect the shuttle from high temperatures during re-entry, while the thermal protection tiles insulate the shuttle from the intense heat of atmospheric friction.
If the space shuttle is exiting the atmosphere, that means you are going into space then no the windows will not turn red. However if you are entering the atmosphere the friction caused by air molecules hitting the orbiter will create plasma around the shuttle. You will see a reddish orange glow out the windows but the windows themselves will not turn red.
They are two long, narrow doors in the belly of the shuttle that open to allow the crew do move whatever is in the cargo bay out into space. Best example: The fabulous Hubble Space Telescope was unloaded out of the shuttle through the payload bay doors.
The main protective covering on the space shuttle is made from reinforced carbon-carbon (RCC) composite materials. These materials are specifically designed to withstand the extreme heat during reentry into the Earth's atmosphere.
Astronauts who have traveled to space aboard the space shuttle have seen the stars from the spacecraft's windows. Seeing the stars from space is a unique and awe-inspiring experience that very few people have had the opportunity to witness.
So they can find where they are going, like the ISS
Ten. Six on the front of the flight deck, two on the roof of the flight deck, and two on the rear of the flight deck to watch payload bay opperations.
Space Shuttle Endeavour was the final Space Shuttle built. It was built to replace Space Shuttle Challenger.
The nose cone made of reinforced carbon-carbonThe the chassis is made of an alloy of titanium, aluminium and vanadiumThe windows are main from reinforced polycarbonate.The rest is made of fibreglass and carbon fibreThe tiles are made of silica ceramic tiles, which can withstand temperatures as high as 3000°F (1650°C) while maintaining the vehicle's structure at no more than 350°F (177°C).New space shuttles like Discovery use composite absorption tiles instead.Polystyrene is used for insulation
The first space shuttle developed by NASA was the Space Shuttle Enterprise, which never flew in space and was used for atmospheric flight tests. The first space shuttle to reach space was the Space Shuttle Columbia, which launched on April 12, 1981.