Pratica di Shadowing: Black Hole Documentary 2019 - Part 1 - Impara a parlare inglese con i video

black hole is a region of space where matter has condensed to such a high density that

the gravity at its surface the surface gravity is so high that you cannot escape it even at the speed of light you are forever trapped it is the fabric of the space-time continuum warped back on

itself and what you fall in the fact that these cosmic objects exist boggles the mind they are

so counterintuitive massive and strange they have been considered hypothetical objects for the longest time in the history of science in his general theory of relativity in 1916 Albert

Einstein first predicted the existence of black holes but it took a German artillery lieutenant fighting on the frontlines of the First World War Karl Schwarzschild to provide the first exact

solution to Einstein's field equations of general relativity where he described how space-time is walked outside a spherical object his mathematical solution shows how it becomes harder for matter

to escape the gravitational field of ultra high dense stars eventually there comes a point where every particle even light becomes gravitationally trapped once matter passes this point there is no

escape this point of no return is called the event horizon and something completely bizarre happens once you approach and go past the event horizon time itself slows down to a complete standstill

this is why early physicists studying these mysterious objects sometimes called them frozen stars the phrase black hole was only popularized by American physicist John Wheeler in 1967 when

it was reportedly suggested by a student at one of his lectures wheeler also best summarized in layperson terms the field equations where he described it as space-time tells matter

how to move and matter tells space-time how to curve it took decades to accept black holes as anything but a mathematical curiosity most of the leading theoretical physicists of the 20th

century insisted that these strange objects could never form in reality Arthur Eddington said I think there should be a law of nature to prevent a star from behaving in this absurd

way but black holes are all too real though it is understandable that even world leading experts in general relativity dismissed them as mere mathematical curiosities after all the

phrase black hole caught on for a reason they are pitch black as they emit no light so how can you take a phenomena seriously if you can't directly observe it how do you see the unseeable

when an ultra-high dense star runs out of nuclear fuel it begins to collapse on its own weight if it's massive enough say 10 to 29 solar masses its collapsed core will turn into a neutron star a way

to break your mind is to try to visualize a star that's 10 times the mass of the Sun with the size of a city that's a neutron star if it has a mass greater than 20 times the mass of the Sun even

the proton degeneracy pressure will not suffice to keep the mass from imploding and collapsing into a single point of infinite density forming a black hole black holes are detected as surrounding

material like gas is funneled by the force of gravity into a disk around the black hole the gas molecules in the disk swirl around the black hole so fast that they heat up and emit x-rays in

the 1960s x-ray astronomy was developing rapidly with a series of rockets and satellites launched into space in 1964 astronomers discovered one of the brightest x-ray sources in the sky in

the constellation Cygnus in 1970 NASA launched a hurroo x-ray Explorer satellite that provided detailed observation and measurements for this strange x-ray radio source it showed Sig x1 had

rapid variability on timescales shorter than a second the mission was also able to calculate the mass of this mysterious object 15 solar masses far exceeding any theoretical limit

for neutron stars making Sig x1 a prime candidate to be the first stellar black hole ever detected

next week we will explore far more ominous black holes than stellar ones subscribe and ring the bell to be notified about part 2 of the black hole series thanks for watching

📺 Stesso Canale

How The Universe Could Destroy Life On Earth

IELTS PrepTOEFL PrepUniversity Students

How Big is The Universe?

University StudentsWorking Adults

✨ Video consigliato

74 frasi

Vocabolario e note di pronuncia per questa lezione

Questo video contiene 23 frasi e 706 parole da ripetere con lo shadowing. Il parlato dura 5:49. Chi parla mantiene un ritmo costante di circa 121 parole al minuto, comodo per lo shadowing. Solo il 75% delle parole rientra nelle 3.000 più comuni dell’inglese, quindi il lessico è impegnativo.

Vocaboli chiave di questo video

15 parole del video che vale la pena imparare, con pronuncia e significato:

Parola	Pronuncia	Significato
gravity sostantivo	/ˈɡɹævɪti/	gravità
collapse verbo	/kəˈlæps/	collassare, crollare
mathematical aggettivo	/ˌmæθ(.ə)ˈmæt.ɪ.kəl/	matematico
density sostantivo	/ˈdɛn.sə.ti/	densità
satellite sostantivo	/ˈsætəlaɪ̯t/	satellite
trap sostantivo	/tɹæp/	trappola, tranello
phrase sostantivo	/ˈfɹeɪ̯z/	espressione, polirematica
mysterious aggettivo	/mɪˈstɪɹi.əs/	misterioso, ignoto
horizon sostantivo	/həˈɹaɪ.zən/	orizzonte
detect verbo	/dɪˈtɛkt/	individuare, rilevare
equation sostantivo	/ɪˈkweɪ.ʒən/	equazione
disk sostantivo	/dɪsk/	disco
theoretical aggettivo	/ˌθi.əˈɹɛt.ɪ.kəl/	teorico
dense aggettivo	/ˈdɛns/	denso
curiosity sostantivo	/ˌkjʊɹ.iˈɑ.sə.ti/	curiosità

I phrasal verb che sentirai

Parola	Significato
heat up verbo	scaldare

Pronuncia a cui fare attenzione

I suoni “th”: mathematical /ˌmæθ(.ə)ˈmæt.ɪ.kəl/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/, hypothetical /ˌhaɪpəˈθɛtɪkəl/
I suoni “sh” e “zh”: equation /ɪˈkweɪ.ʒən/, observation /ˌɑbzɚˈveɪʃn̩/, measurement /ˈmɛʒ.ə.mənt/, constellation /ˌkɑn.stəˈleɪ.ʃən/, gravitational /ˌɡɹævɪˈteɪʃənəl/
Parole lunghe — attenzione all’accento: mathematical /ˌmæθ(.ə)ˈmæt.ɪ.kəl/, mysterious /mɪˈstɪɹi.əs/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/, curiosity /ˌkjʊɹ.iˈɑ.sə.ti/, phenomenon /fəˈnɒm.ɪ.nən/

Come esercitarsi con questo video

Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
Fai shadowing frase per frase a velocità normale, ripetendo ognuna finché il tuo ritmo coincide con quello di chi parla.
Registrati e confronta con l’originale, facendo attenzione a parole come gravity, collapse, mathematical.

La grammatica di questo video

Le strutture che chi parla usa di più, con le parole esatte del video:

Struttura	Nel video
Forma passiva be + participio passato — conta ciò che accade, non chi lo fa	have been considered · is walked · is called
Present perfect have/has + participio passato — un’azione passata che conta ancora adesso	has condensed · have been considered

Cos'è la tecnica dello Shadowing?

Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.

Tecnica dello shadowing: leggi la guida completa passo dopo passo →

Pratica di Shadowing: Black Hole Documentary 2019 - Part 1 - Impara a parlare inglese con i video

How The Universe Could Destroy Life On Earth

How Big is The Universe?

Black Holes Explained – From Birth to Death

We Found Galaxies Too Old for the Universe

Superfluid Dark Matter

What science can’t answer, according to physicist Jim Al-Khalili | Big Think

The Megatsunami That Struck the Entire Planet

Hellraiser, Bataille and Limit Experiences

My script presentation

No Peace Amongst the Stars | Warhammer 40,000 Official Cinematic Trailer

The Professor Who Taught People How To Think (1962)

Brian Cox: Why even Einstein doubted the existence of black holes

Something Travels Faster than Light

Inside Hitler's Final 48 Hours