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[silent]

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[silent]

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[music, birds chirping]

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[music, birds chirping]

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As the

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sun rises over the Guiana Space Center, the team conducts final checks

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on the health and status of the Ariane V rocket and its payload.

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...the James Webb Space Telescope.

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NASA's number one science priority.

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[music]

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The WEbb Telescope is designed to look back to

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a time when stars and galaxies were first forming, over

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13.5 billion years ago. With its revolutionary design.

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and capabilities, the Webb Telescope is about to unleash a new dawn

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of discovery.

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Launch count down: 10, 9, 8

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seconds before liftoff the Ariane V's

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liquid fueled engine comes to full power

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followed by the ignition of the two solid rockets, we have

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liftoff.

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The Webb Telescope is finally on it's way, the result of years

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of study and development by thousands of team members in the United States

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Canada, and Europe. Webb's spacecraft

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ascends nearly vertically through the heavy lower atmosphere of Earth.

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As the rocket reaches maximum acceleration, the spent solid rocket motors

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are jettisoned safely into the Atlantic ocean.

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reaching the upper atmosphere where protection is no longer needed, the payload faring

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is jettisoned and falls away.

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Accelerating through the atmosphere , the Ariane V

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rocket's first first stage expends its fuel and shuts down

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The empty first stage

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then separates from the upper stage

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after first stage separation and before second stage ignition

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the Webb Telescope has a slightly downward trajectory

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as it speeds over the Atlantic ocean, the upper stage motor

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ignites and the accent to L-2 resumes, never again to

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be interupted.

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The exposed telescope is delicate, and must be protected from

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the sun's fierce heat, to avoid over-heating and damage

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a carefully designed series of oscillations are performed that provide the

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necessary protection. Near the end of powered

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flight, the roll program stops and the launcher then assumes the proper attitude for

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separation.

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After separation from the Ariane upper stage, the Webb Telescope

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continues it's journy to L-2 under it's own power.

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Taking the next step to its final orbital station, 1 million miles from Earth.

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The WEbb Telescope is about to

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unleash a new dawn of discovery

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Teh Webb Telescope separates from the launcher second stage

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The white ring close to the Earth represents the Hubble Space Telescope's orbit

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And the larger orbit is the geo-synchronous orbit where more telescommunication

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satellites are located. The solar array is Webb's first deployment

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When completed, all of Webb's electrical power needs are satified by the solar array

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for the remainder of the mission. The onboard control system

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continually monitors and updates the attitude to ensure power generation and thermal safety

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To preserve the cleanliness of the mirros,

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thrusters are located only on the sunlit side of the observatory.

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The trajectory is designed without employing a retro-fire

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which necessitates pointing the delicate telescope at the sun.

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If course corrections are needed, these velocity

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additions must be done early in the flight to most efficiently use the

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mission's limited, precious fuel.

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After completing mid-course correction,

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the Webb Telescope passes the orbit of the moon

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Webb's

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initial transformation, is the deployment of the sunshield pallets

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The tower separating the telescope and instruments from the spacecraft and sunshield is next,

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Next, the aft

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falp deploys. This is key to managing momentum build-up

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and fuel consumption. This structure helps to balance the pressure

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from the sun's light on the Webb Telescope around its center of mass.

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After the sunshield pallets reach their final

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positions, the membrane launch restraints are released.

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These have kept the sunshield membrane safely in place from final stowage

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at the Norhrop Grumman facility in California through shipment and launch.

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The sunshield protective covers roll back, permitting membrane deployment.

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The

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covers over the core region release next

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Then the mid-booms

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extend and the sunshield assumes its hexagonal, tennis court size

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shape

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shape

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It is now time to tension the

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sunshield membranes. Each thinner than a human hair.

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Pulling each of the uniquely sized and shaped layers to their optimal position

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when deployed, the sunshield allows the telescope to cool down

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to -385 degrees fahrenheit

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cold enough to liquify air. While the layer closest to the sun is almost

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190 degrees fahrenhiet above zero. nearly the boiling point of water.

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a difference of almost 600 degrees.

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truly fire and ice. Once in the shadow of the

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deployed sunshield, the telescope and instruments continue cooling down to their

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final operational cryogenic temperatures.

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At the completion of membrane tensioning, the secondary mirror

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deploys into position and is latched rigidly in place.

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The aft deployable radiator releases and springs into

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position, allowing the instruments to radiate their waste heat directly into space.

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And away from the telescope. Disposing of excess heat is

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crucial to the mission so that it does not overwhelm the faint infra red signal

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to be collected from the cosmos.  The

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primary mirror wings deploy and latch in place. Completing the major

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deployments of the largest telescope in space.

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As the Webb Telescope continues out to its operational orbit around

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the sun-Earth L-2, the observatory continues to cool down to its

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final cryogenic temperature state

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I trajectory correction applied 29 days

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after launch, puts the Webb Telescope into its halo orbit.

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A key part of the mission design, the

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sun-Earth L-2 point is where Webb's orbit around the sun is synchronized

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with Earth's. At this point, one million miles

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from Earth, Webb is free from the thermal influences of the Earth and

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all eclipses. Additionally, the sun, Earth and

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moon, the brightest objects in the sky are hidden by the deployed sunshield

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giving Webb a dark, cold, and stable environment

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to carry out its mission of discovery.

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Once the mirrors and detectors are sufficiently cold

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the Wave Front Sensing and Control operations can begin.

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This sophisticated, multi-step operation's ultimate goal

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is to position each of the Webb Telescope's movable mirrors into

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their correct, final positions and orientations.

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Once the mirrors are aligned, the mission team will continue checking

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out the science instruments preparing them for operations.

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Commissioning is completed about 160 days after launch.

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And the science mission is ready to begin.

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This brings to fruition the work of the thousands of members of the

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Webb Team. From the United States of America, Canada, and

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Europe. Astronomers from all over the world can now

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use this facility to study the universe.

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NASA's James Webb Space Telescope

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is a game changer which will revolutionize mankind's understanding of the universe.

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Discoveries made by the

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observatory will re-write text books, inspiring the next generation of

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future engineers and scientists

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this revolutionary tool, will provide mankind with an unprecedented view into the birth

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of the first stars and galaxies, unleashing a new dawn

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of discovery.

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[music]

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