TRANSCRIPTIONEnglish

What Did James Webb Really See At The Beginning Of Time?

52m 9s7,313 mots1,191 segmentsEnglish

TRANSCRIPTION COMPLÈTE

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[Music]

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on Christmas morning 2021 a mighty

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rocket burst into

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life quickly climbing away from the

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ground it soared into the cloud Laden

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sky and headed for the darkness of deep

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space its Target was 1.5 million kilom

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from Earth at a place where the

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gravities of the Sun and our planet

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combine in a very particular way in this

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spot known as a lrange point the payload

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would be held in space fixed in relation

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to the Earth as it circles the sun once

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in location this payload began its

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delicate deployment immense sheets

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unfurled to shade it from the glare of

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the Sun as hexagonal mirror segments

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unfolded and clicked into place it then

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waited until it cooled to The Frigid

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background of

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space after several months the device

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was ready for Operation the latest in a

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long line of technological leaps a

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signal was sent from the earth for this

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most recent Observer to awaken to open

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its eyes and appearer into the

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darkness after 30 years and 10

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billion the James web Space Telescope

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had finally

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arrived James Webb possesses a 6 and 1/2

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M mirror and cameras tuned to see in the

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infrared its mission is to map the lives

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of young stars in our own Milky Way and

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hunt for life on planets in orbit around

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other Suns but it was its view of the

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early universe that caused the first

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controversy the power of James web

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sitting far from the glow of the earth

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is its ability to peer far back in time

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its sensitive instruments can discern

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light that has traveled for more than 10

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billion years emitted by the first star

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in the first fledgling galaxies through

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web's eyes we can witness the birth of

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the

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universe astronomers of course had

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expectations of just what web should see

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in the infant Cosmos over the 20th

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century they had come to realize that

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galaxies even our own Milky Way had

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grown over time they start as small

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groups of stars but through collisions

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and mergers small galaxies grow larger

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until over many billions of years

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galaxies with hundreds of billions of

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stars appear in the cosmos but as

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astronomers poured over the new images

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from James web something did not seem

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right as they peered into the epoch of

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the earliest Stars they expected nothing

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but small featuress blobs but instead

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they saw something

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unexpected large well-formed galaxies

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peeking out of the darkness objects that

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made no sense

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for since the turn of the 21st century

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astronomers have believed themselves to

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be in an era of precision

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cosmology they had determined that

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gravity in the universe was dominated by

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a strange dark matter and the expansion

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of the universe accelerated due to an

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even stranger Dark Energy both of these

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have fed into the most accurate model of

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the universe we have a model known as

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Lambda C

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M and yet James web had revealed large

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galaxies appearing to exist in the first

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billion years of the life of the cosmos

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going against the predictions of this

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hardfought model some scientists have

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been driven back to the drawing board to

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revise their theories of Galaxy

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formation but others much more worried

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fear for the very foundations of our

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understanding of the

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universe but this is not the first time

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that new eyes on the sky have demanded a

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revision of the Cosmos since the

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earliest of times people have looked to

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the Stars to uncover the workings of the

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universe and since the earliest of times

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they have been surprised by what they

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saw and so what do we understand about

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those first galaxies forming in the

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black just after the big bang and do

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these surprises thrown up by James web

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derail our understanding of the universe

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or help strengthen its foundations even

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further

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[Music]

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the first food eaten in space was a beef

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and liver paste that Yuri Karin squeezed

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into his mouth like salty toothpaste he

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followed it up with chocolate sauce this

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[Music]

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YouTube The Story Goes that Galileo

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galile was the first to successfully

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turn a telescope to the skies the device

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a simple arrangement of lenses had only

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recently been invented its Earthly

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employment having mainly been navigation

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surveying and of course Warfare but

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Galileo's Focus was the Motions of the

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heavens the invention of the telescope

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is implicitly tied to the birth of

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modern science a little more than half a

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century after Galileo Isaac Newton also

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turning his attention Skyward replacing

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lenses with a silvered mirror he

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revolutionized the design of telescopes

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sharpening the image and constructing

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the Foreigner of day's massive

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telescopes including James web but

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unlike Galileo Newton's observations

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didn't revolutionize the cosmos but his

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discoveries of the laws of motion and

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gravity certainly did now the orbits of

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planets moons and comets were understood

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not to be a sign of the Divine but the

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results of physical laws that pervade

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the entire

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universe astronomical telescopes

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steadily developed after the time of

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Newton and through each Advance more

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more and more light could be collected

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the Improvement of optical systems

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resulting in clearer and sharper images

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astronomers now had the tools to reveal

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the true beauty and complexity of the

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universe and so just what did they

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[Music]

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see as well as stars and planets the

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skies were often home to magnificent

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comets and by the mid 1700s French

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astronomer Charles Messier was hunting

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for these Heavenly Bodies he was looking

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for the fuzzy coma of a comet formed as

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ice and dust a boiled off the cometry

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surface but in his search he found

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himself constantly

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frustrated we now know that comets are

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rocky icy bodies that orbit the Sun and

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Messier had expected the fuzzy coma to

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move night after night during the

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comet's travels but he came across

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numerous fuzzy objects that stubbornly

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remained in place not changing at all

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Messier decided to elay his frustration

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by cataloging all these anomalies

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ignoring them if he happened to spot one

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and so though messier's catalog of 110

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objects mainly contains simple clouds of

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gas within our Milky Way unknown to

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Messier many of his objects were much

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much more

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distant throughout the 19th century with

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better telescopes astronomers had found

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structure in some of messier's objects

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swirling spiral patterns hinting the

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objects must be rotating eventually two

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giants of astronomy went head-to-head to

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settle the question and by 1921 a great

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debate on the nature of these spiral

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    What Did James… - Transcription Complète | YouTubeTranscript.dev