What major movies have the biggest plot holes?

 One of the most stupid films in terms of plot holes is the 1997 Bollywood film Hero no 1 (a fairly enjoyable but utterly illogical movie), a mix of DDLJ and Bawarchi.

So, the heroine tops the college and gets a trip to Europe (which college and University and this in India). The grandfather doesn't allow her. After a lot of persuasion he does allow her to go, but with her Bua (who paid for her expenses. The film showed that out of the three brothers, one is a college lecturer, another a failed Insurance salesman and third a struggling musician, so who exactly paid for her trip).

Now, the girl checks in a private luxury hotel (did University paid for it?) where our hero, the son of a rich man is also staying. The heroine does nothing academic in her whole trip, and we don't know what the trip was about till the end. She ends up romancing the rich hero and the bua facilitates her.

Back in India, there is some misunderstanding among the father of the boy and the grandfather of girl and the proposed alliance is called off. Now our hero plans to win the hearts of the girl's family by pretending to be a cook.

When our heroine decides to pursue further studies she is shut down and sent to her room to cry. Except for the fact that she was shown carrying 3 books with her going to college. When did she get admission for higher studies? Which books are she carrying because she apparently has not taken admission anywhere?

In Bawarchi, there was a reason why the cook knew cooking, mathematics, philosophy, music and dance etc. In Hero no 1 there is no reason and makers gave no reason whatsoever. Nobody even cared to know how their prospective groom looked like so nobody could identify the hero disguised as cook.

He sings with the girl “Main Tujhko bhaga laya hun tere Ghar se tere baap ke dar se” (I have eloped with you away from your home, for the fear of your father) when clearly the girl’s parents died years ago.

Even though the grandfather hated the boy’s father badly he apparently couldn't recognise him when he came in a disguise with a beard (tough competition to Rab ne Bana Di Jodi).

Even though the salesman brother of the family got insurance worth of many lakhs because of boy’s father’s company he didn't care to know why all his clients came from the same company.

Even though the second brother got saved from getting transferred to remote area due to boy's father he never cared to know how and why the education minister recommended him.

How do black holes acquire their spin, and what leads them to reach near their maximum spin limits?

 Well, black holes acquired their spin the same way you did!

If you're thinking, "What! I'm not spinning. I'm firmly seated (or lying)," well, think again.

Although you may be static, the planet you're on is spinning. And rapidly, too. It's spinning around itself.

And it's taking you for the ride.

It gets more interesting the more you think about it. Our Sun is spinning too. So is the moon, other planets, comets, asteroids, and pretty much everything else in space.

But why?

We Live in a Merry Go 'Round Universe

Image Credits: https://www.jpl.nasa.gov/news/nasas-nustar-helps-solve-riddle-of-black-hole-spin/

It's not hard to see why, you know.

Think of any object in space – an asteroid, planet, star, or whatever you can imagine.

In this case, let's begin with a star.

Let's say, for our argument's sake, that it's currently still and not moving in any way. It doesn't even have a spin of its own.

How long do you figure it can keep up its act?

Sooner or later, something will hit it. It could be something big, like another star, or something small like a comet.

In fact, everything in space is constantly bombarded with stuff. It could be small stuff like comets and rocks. Or it could be big stuff, like a planet-sized body or another star.

Chances are those objects won't hit our star head-on or perpendicular to its surface. The overwhelming majority of them will hit our star at an angle.

They might even trace a hyperbolic path as they collide into our object.

It's like someone accidentally hitting you in the right shoulder as they pass you by. Even without your volition, your body turns in the direction of "their path" due to the sheer force of the impact. In other words, you "spin."

If you were in space, there would be nothing you could do to stop this spin. Fortunately, gravity binds you to Earth, and the friction between your feet and the ground helps you transfer that spin (angular momentum) to Earth.

Our star isn't so fortunate. It gains the spin and keeps it, until something else hits its left shoulder…err…I mean, in the other direction, either slowing it down or making it spin the other way.

Every small thing – no matter how infinitesimally small it is – hitting a star ends up affecting its spin, even if it's by an immeasurable amount, because its energy must be conserved.

This applies to every object in space.

So, nothing in space is ever without spin.

Their spin could be very, very small. But it's always there. Although theoretically it's possible to have an object in space with no spin, it's practically (probabilistically) impossible to have one.

In fact, most stars develop their spin when they're born because the collapsing matter that created them fell together in complex, turbulent, and spiral paths.

So, when these stars eventually die and create black holes, the latter merely retain the spin they inherited from their parent stars.

Now, since they're much smaller in size due to extreme compression, their spin is much, much faster than that of their stars.

I'm sure you've come across the analogy of figure skaters spinning faster when they draw their hands in. So, I won't go into it any further.

To put it simply, black holes spin because everything in the universe is always spinning, too!

So, the next time you're overwhelmed by life and go, "My head is spinning," don't worry. It's the universe and everything in it that's gone bonkers and spinning! Not just you.

How are black holes formed?

 🌟 1. A Massive Star is Born

Every black hole begins its life as a massive star: at least 8 to 20 times the mass of our Sun. These giants burn bright and fast, fusing hydrogen into helium, then heavier elements, all the way to iron.

---

💥 2. Iron: The Unforgiving Core

When the core becomes mostly iron, the star hits a dead end. Why? Because fusing iron doesn't release energy, it consumes it. So the internal pressure that held the star up against gravity collapses: just like a royal guard fainting after standing too long.

---

💣 3. The Supernova Explosion

With no fusion to fight gravity, the core collapses inwards within seconds, while the outer layers explode outward in a cataclysmic supernova, one of the most powerful explosions in the universe.

---

⚫ 4. The Core's Fate — Neutron Star or Black Hole?
What remains after the explosion is a dense core. Now two things can happen:

* If the core's mass is below ~2.5 times the Sun's mass → it becomes a neutron star.

* If it’s above that limit → gravity wins, and the core collapses into a black hole, crushing matter into a point of infinite density called a singularity.

Gravity becomes so strong that not even light can escape. That’s when the star officially becomes a black hole.

---

Bonus: Other Ways to Form Black Holes

• Collisions of neutron stars (like smashing two wrecking balls made of atomic nuclei).

• Primordial black holes (hypothetical and formed just after the Big Bang).
• Galactic mergers and accretion, where black holes grow bigger by swallowing mass and merging with others.

---

Summary in One Line:

A black hole is born when a massive star dies, its core collapses under gravity, and space itself bows so deeply that even light cannot escape.

What happens when two black holes collide?

 

As a result of their collision, enormous amount of energy releases. The two black holes may merge into a larger one resulting emission of gravitational wave. Let's see an example:

First detect black hole merger is GW150914.Two black holes with masses 36 and 29 solar masses collided.The final black hole had a mass of ~62 solar masses.The missing 3 solar masses (about 5.4×10^47 joules) were radiated away as gravitational waves.This is more energy than all the stars in the observable universe emit as light in a brief moment.

A single supernova releases about 10^44 joules.A gamma-ray burst releases about 10^46 joules.A black hole merger like GW150914 released 10^47 joules—the largest energy release ever observed.

What are the most amazing facts about black holes?

 This is a comparison of the Sun’s diameter versus the diameter of Earth.

The sun in itself has enough space to fit snugly 1.3 million planets the same size of Earth within its scorching envelope - that’s pretty big, considering the fact that we humans already consider the distance from England to Los Angeles an immense distance.

In order to turn the Sun into a black hole, you must compress all of the matter you see in the flaming ball of plasma above into a certain size - which is called the Schwarzschild’s radius, or Gravitation radius.

$R_S=\frac{2GM}{c^2}$

(Extremely simple. You just multiply by two the gravitational constant G ($6.673\times {10}^{-11}N\cdot m^2\cdot k{g}^{-2}$), then multiply it with the object’s mass divide by the speed of light (299, 792, 458 m/s) squared.)

The concept of this term is pretty simple: If you compress a given sphere into its Schwarzschild’s radius, the escape velocity from the surface of the sphere would be equal with the speed of light - therefore, forming what we all know as a black hole.

If you were to compress the Sun into its Schwarzschild’s radius, it will be a ball with a diameter of 3 kilometers.

And if you try to compress Earth, you’ll have a black hole the diameter of 9 mm.

About this small.

---

Now meet S5 0014+81.

It’s the largest black hole ever discovered and is heavier than our Sun by 40 billion times (40, 000, 000, 000) in the last observation.

If you plug in the equation above, you’ll find that this black hole has a Schwarzschild radius of about… 119 billions kilometers, along with a said diameter of about 236,39 billion km.

To give you a better perspective:

You see that tiny red dot I drew in the middle of the black hole?

That’s this:

Yes, that’s our entire solar system you’re looking at - including Pluto - Rest in peace :(

S5 0014+81 is 47 times larger in diameter than the distance from Pluto to the Sun, and it takes the spacecraft New Horizon nine years to travel from Earth to Pluto at the speed of 16.26 kilometers PER SECOND.

BOOOM *the sound of your mind exploding*

---

I really didn’t expect this answer to gain positive reactions, so let me present one more thing…

BONUS: S5 0014+81’s size isn’t in ‘vanilla’ form - rather, it’s just a lucky black hole out of many to stumble upon a large amount of ‘food source’ in the process and grow from there by consuming many stars and galactic dusts in its lifetime.

So what if we re-expand our fella right here with all of its bonus mass to its original size using our closest star - the Sun - as a marker? Although I understand that there are a lot of complex processes that went into deciding the final size of the star in its formation, this should be looked upon as a food for thought.

The Sun (1 Mo) has a diameter of 1,391,982 kilometers.

S5 0014+81 is 40,000,000,000 Mo.

So the ‘star’ S5 0014+81 should have a diameter of 55,679,280,000,000,000 kilometers.

Or 1804 Parsecs - 5885 Light years.

That’s five times thicker than the thickness of the Milky Way!

The largest star we’ve ever discovered is UY Scuti.

(The most luminous orange one)

It has a diameter of roughly 2.4 billion kilometers. (2,400,000,000 kilometers).

This is how it’s compared to the Sun.

Scroll up to see the diameter of the ‘star’ S5 0014+81.

That’s 23,199,700 times larger than UY Scuti.

Here is a portrayal:

Found it yet?

No?

Because the Sun isn’t larger than the size of a single pixel in this picture.