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Space Shuttle

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The Space Shuttle was a partially reusable spacecraft system. NASA operated it from 1981 to 2011.

Shuttle profiles
Shuttle profiles

It was officially called the Space Transportation System, or STS. The program aimed to carry people and cargo into low Earth orbit.

Space Shuttle Columbia launching cropped 2
Space Shuttle Columbia launching cropped 2

This system was unique because it combined rocket power with a glider-like vehicle. This allowed NASA to reuse parts of the spacecraft for many missions. The fleet completed 135 missions over its thirty-year history. It served as a vital tool for science and space construction.

Launching the shuttle required a complex, multi-step process. The system launched vertically like a traditional rocket.

STS 135 Launch
STS 135 Launch

The assembly included the Orbiter Vehicle (OV), two solid rocket boosters (SRBs), and an expendable external tank (ET). The three RS-25 main engines on the orbiter and the two SRBs provided the initial thrust.

Two Space Shuttle SRBs on the Crawler transporter
Two Space Shuttle SRBs on the Crawler transporter

The SRBs were jettisoned before the vehicle reached orbit.

STS-9 Spacelab 1
STS-9 Spacelab 1

After the main engines cut off, the ET was jettisoned.

Shuttle ET Separation STS-135
Shuttle ET Separation STS-135

Finally, the orbiter used its two Orbital Maneuvering System (OMS) engines to reach its final orbit. This sequence ensured the heavy fuel and boosters were dropped once they were no longer needed.

Designing the shuttle involved many different ideas and technologies. In the late 1930s, the German government studied a winged rocket called the Silbervogel. Later, the U.S. Air Force explored reusable gliders like the X-20 Dyna-Soar. NASA and the Air Force collaborated on various "lifting bodies" to test flight characteristics.

OV-101 first flight
OV-101 first flight

These tests helped engineers understand how to land a vehicle from high altitudes without engines. In 1971, leaders decided on a delta-wing design. This specific wing shape was chosen to handle the heat and pressure of reentry. This design allowed the orbiter to act as a spaceplane during its return to Earth.

Building the shuttle fleet was a massive industrial task. The first vehicle, Enterprise, was built in 1976 for testing.

OV-101 first flight
OV-101 first flight

It lacked engines and heat shielding because it was used for Approach and Landing Tests. The four main operational orbiters were Columbia, Challenger, Discovery, and Atlantis.

566175main columbia-opf
566175main columbia-opf

After the loss of Challenger in 1986, NASA built a fifth orbiter named Endeavour.

NASA STS 51L Challenger
NASA STS 51L Challenger

The fleet was eventually retired after Atlantis finished its final flight on July 21, 2011.

STS-135 Atlantis' final tow back
STS-135 Atlantis' final tow back

Safety and protection were critical during the design process. The orbiter was made of lightweight aluminum. To survive the heat of reentry, it used a thermal protection system of ceramic tiles.

These tiles were much better than older, single-use heat shields. They could be replaced individually if they were damaged. However, installing these tiles was a slow process. For example, Columbia arrived at the Kennedy Space Center with 6,000 tiles still needing installation. The development of the RS-25 engines also faced many challenges, including nozzle failures and broken turbine blades.

Despite the risks, the shuttle performed incredible feats in space. It was used to launch the Hubble Space Telescope and many interplanetary probes.

The shuttle was also essential for the construction of the International Space Station (ISS).

Endeavour docked to ISS
Endeavour docked to ISS

It participated in the Shuttle-Mir program with Russia to build international cooperation. The fleet's total mission time reached 1,323 days. These missions expanded our knowledge of the universe and our ability to live in space.

When the mission ended, the orbiter returned to Earth by gliding to a runway. Most landings occurred at the Kennedy Space Center in Florida.

Space Shuttle Discovery Landing after STS-124
Space Shuttle Discovery Landing after STS-124

Some landings took place at Edwards Air Force Base in California. If the shuttle landed in California, a modified Boeing 747 called the Shuttle Carrier Aircraft (SCA) flew it back to Florida. This era of spaceflight ended in 2011. For several years, the U.S. relied on the Russian Soyuz spacecraft to reach the ISS. This changed in May 2020 with the launch of the Crew Dragon Demo-2 mission.

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🖼️ Images & Media (25)
File:566175main columbia-opf.jpg
566175main columbia-opf.jpg
File:OV-101 first flight.jpg
OV-101 first flight.jpg
File:Space Shuttle Columbia launching cropped 2.jpg
Space Shuttle Columbia launching cropped 2.jpg
File:Shuttle profiles.jpg
Shuttle profiles.jpg
File:STSCPanel.jpg
STSCPanel.jpg
File:Space Shuttle General Purpose Computer.jpg
Space Shuttle General Purpose Computer.jpg
File:Hubble First Servicing EVA - GPN-2000-001085.jpg
Hubble First Servicing EVA - GPN-2000-001085.jpg
File:STS132 Atlantis undocking2 (cropped).jpg
STS132 Atlantis undocking2 (cropped).jpg
File:STS-9 Spacelab 1.jpg
STS-9 Spacelab 1.jpg
File:STS-133 Rendezvous Pitch Maneuver 3.jpg
STS-133 Rendezvous Pitch Maneuver 3.jpg
File:External_Tank.jpg
External_Tank.jpg
File:Two Space Shuttle SRBs on the Crawler transporter.jpg
Two Space Shuttle SRBs on the Crawler...

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