참석자 1: All right, diving into the early universe today.
참석자 2: Yeah, going way back.
참석자 1: Talking about something so massive it makes our sun look like, well...
참석자 2: Like a grain of sand. Yeah, pretty much. Black hole stars.
참석자 1: Black hole stars.
참석자 2: Not your typical stars.
참석자 1: No, not even close. We're talking about stars that can swallow up...
참석자 2: Whole solar systems.
참석자 1: Whole solar systems? Okay, now hold on a second. How do we even get something that big?
참석자 2: You gotta go back to the beginning.
참석자 1: So we're rewinding the clock to...
참석자 2: The early universe. A few hundred million years after the Big Bang. Now imagine, okay, the universe is just a chaotic mess.
참석자 1: Oh, I bet. Dense, hot, overflowing with hydrogen everywhere. This is before stars, before...
참석자 2: This is like the first act.
참석자 1: Okay, so we just got this like cosmic soup of hydrogen.
참석자 2: Yeah, and dark matter.
참석자 1: Ah, right. Dark matter. And that plays a role here?
참석자 2: Pulling the strings. Okay, so dark matter, it clumps together, forms these massive structures - dark matter halos. They're like gravity wells, pulling in all that hydrogen gas.
참석자 1: It's setting the stage, kind of...
참석자 2: Building the foundations for everything really - stars, galaxies, you name it.
참석자 1: How do we get from giant clouds of hydrogen to a star, let alone a black hole star?
참석자 2: Gravity. It's the master. Inside these hydrogen clouds, the densest parts, they start to collapse, pulling in more and more gas.
참석자 1: Like a runaway train.
참석자 2: Exactly. And as it grows, the pressure, the heat - oh, it's off the charts. And boom, nuclear fusion ignites.
참석자 1: A star is born. These early stars, they were different, right?
참석자 2: They were breaking all the rules.
참석자 1: Right? Because a star can only get so big, right? There's a limit. So what was different back then?
참석자 2: Think about it. A normal star has got a size limit. Outward pressure from fusion balances out the gravity, okay? But these early stars, they had a secret weapon.
참석자 1: Which was the...
참석자 2: The dark matter halos we talked about. They were like an endless supply of hydrogen.
참석자 1: So these stars could just keep growing and growing?
참석자 2: To absurd sizes. How absurd are we talking?
참석자 1: 10 million, 10 million...
참석자 2: 10 million times the mass of our sun.
참석자 1: 10 million suns? It's just... it's unimaginable.
참석자 2: It boggles the mind. And that's when the black hole comes in. That's when things get really interesting.
참석자 1: All right, so we've got this massive, massive star...
참석자 2: Unfathomably massive.
참석자 1: That mass is doing what?
참석자 2: It's putting incredible pressure on the core.
참석자 1: Like a pressure cooker about to explode?
참석자 2: Even more intense than that. Okay, and eventually that pressure, it's too much. The core collapses.
참석자 1: That's how you get a black hole. But wouldn't a black hole just tear the star apart?
참석자 2: That's what you'd think, right?
참석자 1: That's what I'm thinking.
참석자 2: Here's where things get wild. The star survives.
참석자 1: It survives?
참석자 2: It's so massive that even a supernova can't destroy it. So now you've got this tiny black hole - relatively speaking, okay, maybe a few tens of kilometers across - inside a star larger than our solar system.
참석자 1: So it's like a...
참석자 2: A cosmic parasite.
참석자 1: The cosmic parasite, and the star is...
참석자 2: The unsuspecting host.
참석자 1: Wow. So then what happens?
참석자 2: It doesn't just hang out though. It's got a huge appetite.
참석자 1: Right? Because it's a black hole.
참석자 2: The star is basically the next meal.
참석자 1: The black hole is pulling in that star stuff, and the star's trying to hold it together.
참석자 2: Exactly. It's a cosmic tug of war.
참석자 1: So what happens? Who wins?
참석자 2: Well, the black hole keeps eating, getting bigger, more energetic.
참석자 1: And that affects the star. How?
참석자 2: That energy's got to go somewhere. Heats up the star, makes it expand.
참석자 1: Expand? Like, how much are we talking?
참석자 2: We're talking bigger than our solar system. And it's not just getting bigger. It's blazing with energy, jets of plasma shooting out.
참석자 1: Like cosmic fireworks. You got it. Wow, what a way to go. What happens to the black hole after the star's gone?
참석자 2: Yeah, it's not just out there roaming the universe.
참석자 1: Roaming, eating, growing.
참석자 2: It could become thousands of times heavier than our sun.
참석자 1: Thousands of times?
참석자 2: At least.
참석자 1: Okay, back up a second. You said these black hole stars, they could explain supermassive black holes.
참석자 2: I did say that.
참석자 1: So how does that work?
참석자 2: Well, we see these supermassive black holes at the center of galaxies.
참석자 1: Right? Even our galaxy has one.
참석자 2: Exactly. But they're huge.
참석자 1: "Huge" is an understatement.
참석자 2: Billions of times the mass of our sun.
참석자 1: Billions. And we've never been quite sure how they form.
참석자 2: Exactly. Because even if a regular black hole just ate and ate and ate...
참석자 1: It would take longer than the universe has existed to get that big. It just wouldn't add up.
참석자 2: But black hole stars, they could be the answer.
참석자 1: They're the missing link. Maybe... Walk me through this.
참석자 2: Black hole stars, they already have a head start.
참석자 1: Right? They're born massive.
참석자 2: And they just keep growing, eating matter, merging with other black holes. And eventually, they become the anchors of galaxies.
참석자 1: The supermassive black holes we see today.
참석자 2: It's a pretty mind-blowing idea.
참석자 1: It is. But how do we even know if any of this is true?
참석자 2: That's where things get really interesting.
참석자 1: Okay, you got my attention.
참석자 2: We have telescopes.
참석자 1: Powerful ones.
참석자 2: The James Webb, for example. The James Webb can see so far, it's like looking back in time.
참석자 1: To when black hole stars existed.
참석자 2: We could actually see them.
참석자 1: Or at least see what they left behind. So we're looking for like, cosmic fossils?
참석자 2: In a way, yeah.
참석자 1: What kind of fossils are we talking?
참석자 2: You can see the afterglow of their explosions.
참석자 1: Explosions, right? When the black hole ate the star?
참석자 2: Or maybe gravitational waves, ripples in space-time.
참석자 1: From something that massive, I bet. So it's like a giant cosmic treasure hunt.
참석자 2: And the James Webb is our metal detector.
참석자 1: Looking for clues to these ancient titans.
참석자 2: And if we find them...
참석자 1: It would be huge.
참석자 2: It would change everything. How we understand the early universe, black holes, galaxies...
참석자 1: All because of these black hole stars.
참석자 2: They're a key to the past.
참석자 1: This is incredible. And I thought we were diving deep before.
참석자 2: We're just getting started.
참석자 1: We're looking for what, like cosmic dinosaur bones?
참석자 2: Something like that, except...
참석자 1: Instead of digging in the dirt, we're searching for light. Light from billions of years ago.
참석자 2: It's a whole new kind of archaeology.
참석자 1: And if we find these fossils, if we prove black hole stars existed, what then?
참석자 2: That's the best part. Each discovery leads to more questions.
참석자 1: So what mysteries could they help us unlock?
참석자 2: Well, for one, we might finally understand how the first galaxies formed.
참석자 1: Because of black hole stars?
참석자 2: They could have been the seeds, the gravitational anchors that pulled everything together.
참석자 1: So they're not just a cool concept. They're essential to understanding the universe.
참석자 2: Exactly. Black hole stars could change everything.
참석자 1: It's incredible to think something that massive, that powerful could hold the key to the early universe.
참석자 2: And we're just getting started.
참석자 1: That's the craziest part. We're constantly learning new things.
참석자 2: And pushing the boundaries of what we thought was possible.
참석자 1: Black hole stars are definitely proof of that. I mean, when we started this deep dive, I had no idea how much there was to learn.
참석자 2: There's always more to discover. That's what makes the universe so fascinating.
참석자 1: Exactly. And who knows what other mysteries are out there, just waiting to be uncovered.
참석자 2: One thing's for sure: when those discoveries are made, we'll be here to break it all down, right here on the Deep Dive.
참석자 1: Until then, keep looking up and never stop exploring.