Name: ホーキング博士の宇宙 - 105 - ブラックホールとその向こう側 (Stephen Hawking's Universe - 105 - Black Holes And Beyond)
Uploaded: 2021-01-14T04:51:27.000Z
Duration: 53 min 32 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Hawking: THE FARTHER WE PROBE INTO THE UNIVERSE,

THE MORE REMARKABLE ARE THE DISCOVERIES WE MAKE.

BUT THEN OBSERVERS BEGAN TO FIND THINGS IN THE SKY

Narrator: IN THE END, SCIENTISTS WOULD FIND

IMPOSSIBLY BRIGHT OBJECTS BLAZING FROM THE DISTANT PAST,

ASTRONOMERS TUNED IN IN SEARCH OF ALIENS.

AND I'M A AN ASTRONOMER AT THE SETI INSTITUTE

HERE IN LOVELY MOUNTAIN VIEW, CALIFORNIA.

SEARCH FOR EXTRA-TERRESTRIAL INTELLIGENCE.

MEANS WE'RE NOT LOOKING FOR EXTRATERRESTRIAL LIFE,

THAT MEANS THEY CAN HOLD UP THEIR SIDE OF THE CONVERSATION,

THEY STARTED BUILDING LARGE RADIO TELESCOPES,

ACTUALLY BE USED TO SEND MESSAGES, AS IT WERE,

IN 1959, 1960, THE FIRST EXPERIMENTS WERE MADE

USING THIS KIND OF TECHNOLOGY -- A BIG RADIO TELESCOPE --

TO TRY AND EAVESDROP ON ANY CIVILIZATIONS

THESE CLEAR RADIO VIEWS, SO YOU KNEW THAT

THERE'S A VERY STRONG SOURCE OF RADIO WAVES.

YOU WOULD TELL YOUR FRIEND THE OPTICAL ASTRONOMER,

AND THEY WOULD POINT IT IN THAT DIRECTION.

Narrator: WHERE THE UNIVERSE EMITTED A RADIO SIGNAL,

OPTICAL ASTRONOMERS NOW TRAINED THEIR GAZE.

BUT AT FIRST, ITS SIGNIFICANCE ELUDED THEM.

Man: PEOPLE SAW THAT THEY WERE UNUSUAL OBJECTS.

FOR EXAMPLE, A GALAXY THAT HAD A PECULIAR BLOB WITHIN IT

IN SOME CASES WAS FOUND TO EMIT RADIO WAVES.

WHEREAS A NORMAL-LOOKING, BORING-LOOKING GALAXY DID NOT.

AND LOOKED AS THOUGH IT MIGHT BE EXPLODING --

WHEREAS MORE NORMAL, QUIESCENT CLOUDS OF GAS DID NOT.

Narrator: GRADUALLY, THE STRANGE EVIDENCE MOUNTED.

ON THE SOURCE OF PARTICULARLY STRONG RADIO SIGNALS,

THEY EXPECTED TO SEE COSMOLOGICAL CATASTROPHES.

INSTEAD, THEY WERE LEFT WITH COSMIC QUESTIONS.

FROM WHICH RADIO WAVES SEEMED TO BE COMING,

THERE WAS JUST THE USUAL SMATTERING OF STARS,

AND THERE WAS NO OBVIOUSLY EXPLODING STAR,

NO TURBULENT CLOUD OF GAS, NOTHING SEEMINGLY UNUSUAL --

THAT IS, UNTIL OBSERVERS BEGAN TO LOOK A LITTLE CLOSER.

Filippenko: 3C273 IN THE CONSTELLATION VIRGO

YET WE KNOW THAT ORDINARY STARS DON'T EMIT RADIO WAVES,

Narrator: USING A TECHNIQUE CALLED SPECTROSCOPY,

WHEN YOU TAKE A SPECTRUM OF AN ORDINARY STAR,

THAT IS WHEN YOU PASS THE LIGHT THROUGH A PRISM

YOU CAN SEE SMALL DIPS, SMALL WIGGLES IN THE SPECTRUM.

AND THOSE ARE THE WIGGLES THAT ARE PRODUCED BY ATOMS,

BY GASES IN THE ATMOSPHERE OF THOSE STARS

AND BY IDENTIFYING THE PATTERN OF THESE LINES,

THESE LITTLE WIGGLES THAT APPEAR IN A STAR,

YOU CAN DEDUCE WHETHER THE ATMOSPHERE OF THE STAR

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ホーキング博士の宇宙 - 105 - ブラックホールとその向こう側 (Stephen Hawking's Universe - 105 - Black Holes And Beyond)

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