शैडोइंग अभ्यास: How To Terraform Venus (Quickly) - वीडियो के साथ अंग्रेजी बोलना सीखें

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155 वाक्य

यदि वाक्य बहुत छोटे या लंबे हों, तो समायोजित करने के लिए Edit पर क्लिक करें।

Leaving Earth to find new homes in space is an old dream of humanity, and will sooner or later be necessary for our survival.

The planet that gets the most attention is Mars,

a small, toxic and energy-poor planet that just about seems good enough for a colony of depressed humans huddled in underground cities.

But what if we think bigger?

What if we take Venus, one of the most hostile and deadly places in the solar system, and turn it into a colony.

Not by building lofty cloud cities, but by creating a proper second Earth.

It might be easier than you think.

Venus is by far the hottest planet in the solar system, with a surface temperature of 460 degrees Celsius, hot enough to melt lead.

This heat is due to the most extreme greenhouse effect in the solar system.

CO2 is great at trapping heat.

Even a rise from 0.03% to 0.04% in Earth's atmosphere is heating up our planet right now.

Venus's atmosphere is 97% CO2.

Also, Venus's atmosphere is 93 times denser than Earth's.

Standing on Venus's surface would feel like taking a dive about 900 meters deep into the ocean.

The pressure would kill you instantly.

It's a truly horrible place, so why should we even bother?

First and foremost, Venus is almost as big as Earth and has 90% of its surface gravity.

Surface gravity is a big problem when colonizing the solar system

because it's very likely that long stays in low-gravity places will have negative health effects.

Venus's size means it could be the second largest habitat in the solar system.

A new home for billions of humans and trillions of animals, with oceans, lush forests and a beautiful blue sky.

A properly terraformed Venus may be the most pleasant place to live outside of Earth.

While we can't exactly terraform Venus today, a slightly more ambitious future version of us could take this project on.

It will take a few generations to complete and be a huge challenge, like building the Great Pyramids was for our ancestors.

But then, it's not like humans have never started projects that took more than a lifetime to complete.

Okay, let's do it.

Before anything else, we need to cool Venus down and remove the gas that makes up the extremely heavy atmosphere.

As mentioned, there's a lot of it.

Around 465 million billion tons.

How do we do that?

There are a few options.

We could create giant solar collectors powering a huge array of laser beams

that heat up the atmosphere so much that it's blasted into space.

Although we would need thousands of times the entire power generating capacity of humanity

and it would still take thousands of years to remove the atmosphere.

Another way is to sequester the atmosphere, binding the CO2 in different compounds through chemical reactions.

We could mine elements like calcium or magnesium on mercury and shoot them at Venus via mass driver systems,

electric rails that make rockets unnecessary on smaller planets.

The metals would combine to bind the CO2 into different carbonates basically forever.

But the scale makes the whole thing impractical.

We would need several hundred billion tons of material to sequester the CO2 this way.

Seems like a waste of material and might take too long.

An equally ridiculous idea that could actually work is to put Venus in the shade,

literally, by constructing a huge mirror to blot out the Sun to just freeze the atmosphere.

The mirror doesn't need to be complex or massive, just a very thin foil with a little structural support.

Building such a large flat surface

so close to the Sun will turn it effectively into a solar sail and push it out of position.

So instead of one giant circular object, our mirror will consist of many different pieces.

Annular slats of angled mirrors can reflect sunlight from one set of mirrors to the next.

Mirrors would be angled, reflecting light from one to another until the light is redirected to the back, balancing the force on the front and holding them in position.

After a few years of getting the infrastructure in place, things start slowly and then escalate.

For the first few decades, the atmosphere slowly cools down but stays dense and deadly.

Until after some 60 years, it reaches the critical temperature of 31 degrees Celsius.

Suddenly, the Great Flood begins on Venus as CO2 turns to liquid at this pressure and begins to rain down.

A constant global rainstorm of unbelievable proportions lasting 30 years.

The pressure and temperature suddenly begin to drop in unison.

For almost a century, puddles turn into lakes and oceans.

The surface temperature is now minus 56 degrees Celsius and the pressure has dropped to only seven times the pressure on Earth.

Finally, at a really unpleasant minus 81 degrees Celsius, the CO2 oceans begin to freeze and the rain turns into snow.

This leaves us with a frozen Venus covered in oceans as hard as rock and gigantic CO2 glaciers.

remains of the atmosphere is mostly nitrogen at about three times Earth's surface pressure.

If you don't mind freezing and suffocating, you can now take a stroll over Venus's surface.

But the frozen CO2 remains a bit of a problem.

At some point we want to warm up the planet, but if we do, the CO2 ice will melt and fill up the atmosphere again.

So we need some way to keep it from doing that.

One is to simply cover it all with cheap plastic insulation

and cover it up with ground up Venus rock or water oceans.

Although some planetary scientists will be very stressed out about us building a new planet containing a potential time bomb like that.

A few unfortunately timed volcanoes could melt a lot of CO2 at once and ruin everything.

Another obvious solution is to shoot it all out into space

and collect it into a small moon for storage and future use.

We can make this more efficient by using mass drivers instead of rockets, but moving all that mass will still be a pretty intense challenge that will take some time to solve.

Whatever we end up doing with the atmosphere, to move forward we need water, which we could get from ice moons.

Europa, a moon of Jupiter, has twice as much water as Earth's oceans.

Now, catching a moon and transporting it through the solar system is not exactly easy.

So instead, it might be easier to cut chunks of ice off Europa

with an army of construction drones and shoot them at Venus using more of those mass drivers.

Space tethers could save us a lot of effort and energy here.

We made a whole video explaining how they work, but in a nutshell, they are slings that can take a payload on both ends.

On Europa, they do most of the work needed to catapult our ice to Venus.

The ice hits the Venus tethers, which gently drop it into the atmosphere, where it falls down as snow.

In exchange, the Venus tethers get to catch CO2 ice shot up from below and accelerate it into orbit.

We can remove excess nitrogen using this same method to further lower our atmospheric pressure.

After a few decades or centuries, Venus would be covered by a nice, shallow, frozen ocean a few hundred meters deep.

It would look extremely different from today.

A few continents and countless islands have formed.

This is beginning to look a bit like our planet planet.

Now the last and most magnificent phase of terraforming begins, making the atmosphere breathable and adding life.

First, we need light though, and we need to heat the planet up again.

A Venus day is 2,802 hours long, more than 116 Earth days.

So, if we just remove our giant mirror, we would grill half of our planet.

Even without the massive atmosphere, temperatures would reach unbearable levels.

The simplest way to create a day-night cycle

and let some energy in again is with another set of mirrors to illuminate our continents and melt our water oceans,

which would let us completely control how much energy we get and where it goes.

The atmosphere is now mostly made up of nitrogen and basically devoid of oxygen.

So the first inhabitants will likely be trillions and trillions of cyanobacteria, which can get photosynthesizing and release oxygen.

We know that they can quickly turn around the atmosphere of a planet

because billions of years ago they were probably responsible for turning

100

the toxic atmosphere of our young earth into an atmosphere with enough oxygen for more complex animal life.

101

But not only that, cyanobacteria can fix nitrogen from the atmosphere

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and turn it into nutrients that can be used by living beings.

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This way, they will essentially fertilize our dead ocean water and prepare it for more complex organisms. On land,

104

our colonists need to grind down some of the former Venusian surface to make soil for nitrogen-fixing plants to grow on.

105

Eventually billions of trees would spread, creating large forests covering massive parts of the continents.

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Venus would turn green.

107

To speed things up, CO2 would be strategically released to supply the plants and cyanobacteria.

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Areas already covered with plants could get extra daylight from our orbital mirrors

109

so the plants would be active for most of each day.

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Maybe we won't have to do this with the same plants and animals we know today.

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As genetic engineering matures and our understanding of genetics and the machinery of life expands, we might just engineer life as we need it.

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All in all, it would take several thousand years to make the atmosphere breathable by humans.

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In the meantime, you could stroll around with nothing more than regular clothes and an oxygen mask.

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Settlers would enjoy a vast new planet, filled with resources and bathed in sunlight.

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They might think of new ways to use the vast amounts of carbon dioxide ice and nitrogen orbiting in space above,

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industrial processes, rocket fuel, or even boosting the terraforming of another planet like tiny Mars.

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Venus is fully terraformed.

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Animals roam through vast ecosystems.

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are being constructed.

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Billions of settlers and their descendants make this world their home.

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They will see images of the past.

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How Venus was once the most hostile planet around.

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How it took hundreds of years to freeze hell

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and to ship in the oceans and another few thousand years to make it possible to breathe freely.

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They will barely be able to believe it.

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Okay, maybe it's not that It's easy to terraform Venus

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and a lot of things must go right for this future to become reality.

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But it is possible and with technology

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that is within the reach of a motivated and slightly more advanced humanity that wants to venture into space.

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The only thing that's stopping it is our imagination.

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And that at least is a problem that's easy to overcome.

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Welcome to the Kurzgesagt Lab.

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Let's conduct a few stellar experiments.

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We'll first add some more mass to this protostar.

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More.

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A bit more.

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Wow, we've just created a blue giant.

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A star with 10 times the mass of our Sun.

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Let's now add a couple of million years and see what happens.

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A supernova.

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Breathtaking.

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And look, it leaves behind a black hole.

143

Fascinating stuff.

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Now we record our findings.

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Be careful to preserve the sparkle.

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It's now time for Duck's final inspection.

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This one is always a nail biter, he has incredibly high standards.

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Luckily for us, our work is scientifically accurate, offers an overview of important astrophysical processes and is a real stunner.

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Duck approves.

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Looks like it's ready to be shared with the world as a poster, a very special piece of Kurzgesagt you can take home and touch.

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You can get this very special poster along with many other sciencey

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Every Kurzgesagt product you buy directly funds another moment we get to spend working on our videos.

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Thank you so much for being a part of our story and for making this channel possible.

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Thank you.

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संदर्भ और पृष्ठभूमि

यह वीडियो मानवता के लिए विभिन्न ग्रहों पर जीवन स्थापित करने के पुराने सपनों का अन्वेषण करता है। वीनस, जो सौर मंडल का सबसे गर्म और सबसे विषैला ग्रह है, इसका विषय है। वीडियो में बताया गया है कि कैसे वीनस को एक जीवनदायिनी ग्रह में बदलने की चुनौतियाँ और संभावनाएँ हैं। इसमें ऐतिहासिक परियोजनाओं की तुलना की गई है और यह समझाया गया है कि विज्ञान और प्रौद्योगिकी की मदद से हम इसे कैसे हासिल कर सकते हैं। यह वीडियो अंग्रेजी बोलने वालों के लिए संवाद और सुनने की प्रवीणता को बढ़ाने का एक अच्छा स्रोत है।

दैनिक संवाद के लिए शीर्ष 5 वाक्यांश

"हमारे लिए जीवन को कहीं और स्थापित करना आवश्यक होगा।"
"क्या हम इससे बड़ा सोच सकते हैं?"
"वीनस का तापमान बहुत ही उच्च है।"
"इस परियोजना के लिए कई पीढ़ियों की आवश्यकता होगी।"
"जलवायु परिवर्तन के बिना, यह असंभव है।"

चरण-दर-चरण शैडोइंग गाइड

यदि आप इस वीडियो के संवाद को संवाद में सुधारने के लिए 'शैडोइंग' तकनीक का उपयोग करना चाहते हैं, तो निम्नलिखित चरणों का पालन करें:

सुनें और समझें: वीडियो को ध्यान से सुनें और सभी महत्वपूर्ण बिंदुओं को समझें।
वाक्यांशों को दोहराएं: शीर्ष 5 वाक्यांशों को स्पष्टता के साथ दोहराएं। कोशिश करें कि आपकी उच्चारण सही हो।
शैडो स्पीक तकनीक का उपयोग करें: वीडियो को धीरे-धीरे चलाकर उसके संवाद को अपने शब्दों में कहने का प्रयास करें। इससे आपकी भाषा का प्रवाह बढ़ेगा।
रिकॉर्ड करें: अपने शैडो स्पीकिंग को रिकॉर्ड करें और तुलना करें कि क्या आप वीडियो से मेल खा रहे हैं।
लगातार अभ्यास करें: नियमित रूप से इस प्रक्रिया को दोहराएं, जिससे आप अपनी अंग्रेजी संवाद क्षमता में सुधार कर सकें।

इस प्रकार से शैडोइंग तकनीक का उपयोग करके आप अपनी अंग्रेजी बोलने की क्षमता को तेजी से बेहतर बना सकते हैं। एक स्थायी संवाद और उच्चारण के साथ, आप अंग्रेजी शैडोइंग के माध्यम से अधिक आत्मविश्वास के साथ बातचीत कर सकेंगे।

इस वीडियो का व्याकरण

वक्ता जिन संरचनाओं का सबसे अधिक प्रयोग करता है, वीडियो के असली शब्दों के साथ:

संरचना	वीडियो में
शर्त वाले वाक्य if + उपवाक्य, will/would + क्रिया — शर्त और उसका नतीजा	if we do, the CO2 ice will melt
Passive voice be + past participle — ज़ोर इस पर कि क्या होता है, न कि कौन करता है	would be angled · would be covered · is now mostly made
Present perfect have/has + past participle — बीता हुआ काम जिसका असर अभी भी है	have never started · has dropped · have formed

शैडोइंग तकनीक क्या है?

शैडोइंग (Shadowing) एक विज्ञान-समर्थित भाषा सीखने की तकनीक है जो मूल रूप से पेशेवर दुभाषिया प्रशिक्षण के लिए विकसित की गई थी। विधि सरल लेकिन शक्तिशाली है: आप मूल अंग्रेज़ी ऑडियो सुनते हैं और तुरंत इसे ज़ोर से दोहराते हैं — जैसे वक्ता की छाया 1-2 सेकंड की देरी से। शोध से पता चलता है कि यह उच्चारण सटीकता, स्वर, लय, जुड़ी हुई ध्वनियाँ, सुनने की समझ और बोलने की प्रवाहशीलता में काफ़ी सुधार करता है।

शैडोइंग तकनीक: पूरी चरण-दर-चरण गाइड पढ़ें →

शैडोइंग अभ्यास: How To Terraform Venus (Quickly) - वीडियो के साथ अंग्रेजी बोलना सीखें

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संदर्भ और पृष्ठभूमि

दैनिक संवाद के लिए शीर्ष 5 वाक्यांश

चरण-दर-चरण शैडोइंग गाइड

इस वीडियो का व्याकरण

शैडोइंग तकनीक क्या है?