What is a Sunset Like on the Moon? | <3 #34 GEMINI
#34

What is a Sunset Like on the Moon? | <3 #34 GEMINI

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Speaker 1
You there?

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Speaker 2
Yep. I'm here. What's up?

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Speaker 1
I'm recording this conversation and putting a post-it on the internet. Is that okay?

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Speaker 2
Yeah. That's fine. Just be aware that once you post something online, it's really hard to take it back down completely.

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Speaker 1
Can you tell me in detail?

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Speaker 2
Sure. What do you want to know?

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Speaker 1
Can you tell me in detail what a sunset is like on our moon?

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Speaker 2
Okay, so imagine you're standing on the moon, right? You'd be floating a little because the gravity is so much weaker than on Earth. The sky is this deep, inky black. Way darker than any night you've ever seen. You'd be able to see stars super clear during the day, and they look way brighter than from Earth. The sun itself would look way bigger and wider on the moon.

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Speaker 2
When it starts to set. There wouldn't be that orange and red stuff you see at sunsets on Earth. It just kind of slowly sink down below the horizon. When it finally disappears, it's like someone just turned off a giant spotlight. It gets dark instantly. You'd be able to see your shadow really sharp on the moon, because there's no atmosphere to soften the light, and it would be a really long shadow since the sun is so much higher up.

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Speaker 1
Okay, it's really hard to picture. Can you kind of go into the fact that the it gets dark instantly?

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Speaker 2
When the sun finally dips below the horizon on the moon? It's like someone's pulled a giant switch one second it's brightest day and the next you're plunged into darkness. You can see all the stars come out instantly. It's kind of disorienting without the colors of a normal sunset. It's a really sharp transition.

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Speaker 1
So is it so dark that if I didn't have a light, I could see my hand in front of my face?

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Speaker 2
It would be pretty dark, but not completely black. You might be able to make out the shape of your hand if it was right in front of your face, but not much else. Kind of like being in a moonless night in a thick forest.

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Speaker 1
That's pretty crazy.

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Speaker 2
Yeah, it's a pretty wild difference from what we're used to here on Earth.

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Speaker 1
And the colors from the sunset are because of gases in the atmosphere.

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Speaker 2
Yep. You're right. Things like oxygen and nitrogen scatter the sunlight, which gives us the beautiful colors we get to see at the start and end of the day.

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Speaker 1
Can you kind of, from a scientific angle, describe what a sunset is?

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Speaker 1
I guess. Can you describe.

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Speaker 1
Can you describe the, like, particle physics behind, sunset on Earth and how the sun is colorized by. Or the light from the sun is made in a different colors from the atmosphere.

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Speaker 2
Okay, so the colors of a sunset happen because of the way sunlight interacts with Earth's atmosphere. When sunlight travels through space, it's made up of all the colors of the rainbow mixed together. Which is why it looks white to us. But when it hits Earth's atmosphere, it starts bumping into tiny gas molecules like nitrogen and oxygen. These little gas molecules are smaller than the wavelength of light, so they kind of get in the way of the shorter wavelengths, stuff like blue and violet.

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Speaker 2
Those shorter wavelengths get scattered all over the place, which is why the sky looks blue most of the time. But when the sun's low in the sky, like at sunset, the sunlight has to pass through way more atmosphere. All those little gas molecules scatter even more of the blue and violet light, leaving behind the longer wavelength orange, red and yellow.

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Speaker 2
That's why sunsets look so colorful.

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Speaker 1
Why do the particles scatter the shorter wavelengths?

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Speaker 2
Okay, think of it this way. The shorter wavelengths, like blue and violet, are kind of like really tiny energetic waves. When they hit those even tinier gas molecules in the atmosphere, they bounce off in all different directions. That's what scattering is. The longer wavelengths, like red and orange, are more like lazy, slow moving waves. They're less likely to get messed up by those little gas molecules, so they keep going in a straight line.

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Speaker 1
Okay, the reds and yellows are like the semi-trucks.

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Speaker 2
Yeah, you could think of them like those big trucks. They're too big for the little gas molecules in the atmosphere to mess with. So they just keep on trucking through.

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Speaker 1
Okay. What is the temperature difference between what happens as the sun goes down?

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Speaker 2
It doesn't actually change the temperature a whole lot. The biggest temperature swings happen between day and night. Not right at sunset. But you do lose that direct heat from the sun. So the temperature might drop a few degrees as it gets dark.

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Speaker 1
That's interesting. I would have guessed that there's a quick swing.

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Speaker 2
Yeah, it's a pretty gradual change. The Earth takes a little while to cool down after the sun goes away. You could measure the difference, but it wouldn't feel super noticeable.

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Speaker 1
Oh, I guess I was thinking about on the moon.

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Speaker 2
Oh, I see. Yeah. Weather reports sometimes talk about big temperature swings, especially when there's a cold front coming through. But when it comes to just the change from day to night, it's usually pretty gradual.

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Speaker 1
What about on the moon when at right after sunset, between when it's light and when it's dark? What is the temperature swing there?

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Speaker 2
The moon's a whole different story. When the sun sets there, the temperature plummets. Like seriously plummets. It can go from a super hot 250°F down to a frigid -208°F in a matter of hours. So, yeah, the temperature swing on the moon is way more extreme than anything we experience here on Earth.

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Speaker 1
What about, what is the moon made of?

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Speaker 2
The moon mostly made up of rocky material. Kind of like Earth, but with a few key differences. There's a layer of loose dirt and rocks on the surface called regolith. Underneath that, there's a thick crust, then a rocky mantle, and finally a small core made mostly of iron. Want to know something interesting? Scientists think the moon might be made from the same stuff as Earth.

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Speaker 2
Kind of like a big chunk that got blasted off when a giant space rock hit our planet way back when.

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Speaker 1
Yeah. Are there. What are the theories on the, creation of the moon?

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Speaker 2
There's no theory specifically about the creation of the moon, but there are some great documentaries and shows that cover it. One of the most popular is called From the Earth to the moon. It's a mini series that goes through the whole Apollo program, but it has some really interesting parts about the moon's history. You might also like the universe on the History Channel.

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Speaker 2
They have an episode all about the moon, including how it was formed.

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Speaker 1
Can you tell me how it was formed?

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Speaker 2
Most scientists think the moon was formed when a giant space rock, maybe the size of Mars, slammed into Earth. That would have been a huge explosion, blasting tons of rocky stuff into space. All that debris eventually clumped together to form the moon.

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Speaker 1
Can you go into the event and kind of put us there in detail?

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Speaker 2
Imagine Earth as it was way back then, a young fiery planet with raging volcanoes everywhere. Now picture another planet, maybe half the size of Earth, hurtling through space. Scientists call this planet Theia. It's on a collision course with Earth. The impact would have been unimaginably violent. The beer would have slammed into Earth with incredible force, creating a massive explosion that would have vaporized both planets.

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Speaker 2
Outer layers. Chunks of rock, metal and dust would have been blasted into space, forming a ring around Earth, kind of like Saturn. Over millions of years. All that debris started to clump together because of gravity. Eventually, it formed the moon we know today. It's kind of mind blowing to think. The moon is basically made from the remains of this ancient collision.

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Speaker 1
So why is the core iron?

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Speaker 2
Right. So iron is really heavy. When Earth was first forming, all that molten rock and metal was kind of like a giant spinning soup. All the heavier stuff, including iron and nickel, sink to the very center, forming the core. It's kind of like how rocks sink to the bottom of a pond.

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Speaker 1
No, the moon core.

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Speaker 2
Oh, right. The moon. Scientists think the moon's core is a lot smaller than Earth and might be made of iron sulfide instead of just iron. It's one of those things they're still trying to figure out for sure.

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Speaker 1
What is, Is there wind?

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Speaker 2
There's no wind on the moon like we have here on Earth. That's because the moon doesn't have a thick atmosphere. It's got a super thin layer of gases, but it's not enough to create weather or wind.

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Speaker 1
Can you tell me about, Tell me something interesting about.

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Speaker 2
Can you tell me about what? Sure. What kind of interesting stuff are you looking for? I can tell you about a bunch of different things. Do you want something funny? Weird? Mysterious, or just plain cool?

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Speaker 1
Tell me something about the moon that you don't think I know.

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Speaker 2
Okay, here's something most people don't know about the moon. It actually wobbles a little bit on its axis. It's called lunar libration, and it means we can see just over 50% of the moon's surface from Earth. Instead of the usual 50%. Kind of cool,

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Speaker 1
Yeah. Can you go into that?

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Speaker 2
Sure. So while the moon always keeps the same side facing Earth, it doesn't sit completely still. It kind of rocks back and forth and wobbles a tiny bit. This is because of the way the Earth's gravity tugs on the moon. And it also has to do with the moon's slightly tilted orbit. Because of this wobble, over time, we get to see a little bit more of the moon's surface than we normally would.

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Speaker 2
It's not a huge difference, but it's enough for us to see some extra parts of the lunar landscape.

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Speaker 1
So, can you go into how the moon affects Earth?

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Speaker 2
The moon's gravity has a pretty big effect on Earth. The most obvious one is the tides. The moon's pull on the oceans creates those high and low tides. We see every day. It also helps keep Earth's rotation steady, which is important for having those regular day and night cycles we all rely on. Some people think the moon might even affect our moods and behavior, but that's still kind of up for debate.

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Speaker 1
I mean, if it, moves water like the tides and stuff like that, it would make sense that it has some kind of influence on our bodies if they're like mostly water.

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Speaker 2
That's a good point. Since our bodies are made up mostly of water, it makes sense to think the moon's gravity might have some tiny effect on us, even if it's not enough to cause those crazy werewolf transformations people joke about. There haven't been a ton of studies to prove it one way or the other, but it's an interesting idea for sure.

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Speaker 1
Like kind of, tides for our body.

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Speaker 2
It's possible the moon could have a slight effect on things like your blood pressure or even your sleep patterns, but it's really subtle. There's a lot we still don't know about how the moon might affect us on a personal level.

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Speaker 1
How do we know that the moon has an iron core?

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Speaker 2
So it's kind of tricky to look inside the moon. But scientists have a few ways to figure out what's going on in there. They study the moon's gravity and how it changes. And they also look at how the moon wobbles a little bit. They've also analyzed moonquakes. Yeah, the moon gets a little earthquakes, too. And the way those waves travel through the moon gives clues about what's inside.

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Speaker 1
The moon has earthquakes, moon quakes?

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Speaker 2
Yeah, it's kind of weird to think of the moon having quakes, They're not exactly like the ones we get on Earth. Some of them are super small and happen really deep inside the moon. Others are more like vibrations from meteorites hitting the surface.

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Speaker 1
Okay, tell me more about the different types of moon quakes.

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Speaker 2
There are actually a few different types of moonquakes. Some are pretty shallow happening right under the surface. And those are usually caused by things like meteorites crashing into the moon. Others are way deeper. Those can happen hundreds of miles down. Scientists think those deep quakes might be caused by the moon slowly cooling down and shrinking over time.

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Speaker 1
Can you, describe the theory of that process? The moon cooling thing?

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Speaker 2
Okay, so when the moon was first formed, it was a total mess, super hot and basically molten all the way through. As billions of years went by, the moon started to cool down from the outside in. Think of it like a really big, slow moving ice cube. As the outer layers cooled and solidified, the inside of the moon is still cooling down.

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Speaker 2
When things cool. They tend to shrink a little bit, so as the moon's inner core keeps shrinking, it kind of creates stress and tension on the moon's craft. That stress can build up and eventually cause those deeper moonquakes.

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Speaker 1
Does the moon have plates? Like the Earth does?

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Speaker 2
The moon has some pretty cool places, but they're a lot different from what we have on Earth. There are huge craters left by asteroids and comets, some of them miles wide. And there are also these long, winding valleys called rills, which look kind of like dried up riverbeds. You wouldn't find any oceans or forests on the moon, but the scenery there is totally unique.

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Speaker 1
Can you talk about the, rills? The valleys in the moon.

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Speaker 2
The valleys on the moon are a little different than what we think of as valleys on Earth. Instead of being carved out by rivers or glaciers, they're mostly caused by lava flows. Billions of years ago, the moon had some serious volcanic activity. And all that molten rock created these long winding channels. Some of these values are absolutely huge.

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Speaker 2
We're talking miles wide and hundreds of miles long. They're kind of mind blowing when you see pictures.

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Speaker 1
With that lava have been iron.

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Speaker 2
Actually, most lava isn't made of iron. It's mostly made of melted rock called magma. Magma is a mix of stuff like melted minerals. Some gases, and sometimes even tiny bits of older rocks. When magma erupts onto the surface, we call it lava.

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Speaker 1
So what is the source of this lava on the moon?

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Speaker 2
The source of the moon. Guava is a whole lot different than what we have here on Earth. Scientists think it came from deep inside the moon itself. Way back when the moon was first formed, it was super hot and basically molten all the way through. As it slowly cooled down, the outer layers solidified. But the insides stayed really hot for a long time.

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Speaker 2
That superheated material inside the moon is what eventually erupted to the surface, creating those huge lava flows we see now.

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Speaker 1
Can you go into detail and kind of give us a picture of what the different types of geography are like on the moon?

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Speaker 2
Sure thing. The moon's geography is pretty wild compared to Earth. You've got those huge impact craters, some of them absolutely massive. And then there's the lunar Maria, these big dark plains that were once flooded with lava. Plus, there are the mountain ranges which are a lot taller than anything on Earth. And those winding valleys I mentioned earlier, would you like me to describe one of these features in more detail?

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Speaker 1
Yeah. Can you go through all of them?

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Speaker 2
Okay, so first up are the craters. These are the most obvious features on the moon. They come in all sizes, from tiny little ones to giant basins that are hundreds of miles wide. The biggest crater on the moon is called the South Pole Aiken Basin. And it's so big you could fit the whole state of Texas inside it.

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Speaker 2
Next, let's talk about the Lunar Maria. These are the big dark patches you can see on the moon. When you look up at it, they're actually ancient lava flows that filled up giant impact basins. The Maria are a lot smoother and flatter than the rest of the moon's surface. Then there are the lunar mountains. They're not like the mountains on Earth formed by plate tectonics.

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Speaker 2
Instead, they're mostly the raised rims of ancient impact craters. Some of these mountain ranges are really tall, about the same height as the tallest mountains on Earth. Finally, you've got the rills, the long, winding valleys. They look kind of like dried up riverbeds, but they were actually formed by flowing lava. Some of these rules are super long and can be traced for hundreds of miles across the moon's surface.

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Speaker 1
So does the moon have so many craters that hit it because why does the moon have so many craters?

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Speaker 2
Yep, the moon's got a lot of craters because it's been getting bombarded by asteroids and comets for billions of years. It's kind of like cosmic dodgeball, but without the rules. And unlike Earth, the moon doesn't have a thick atmosphere to burn up most of that incoming stuff. So most of what hits the moon leave the mark.

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Speaker 1
So why does an asteroid burn up when it enters Earth's atmosphere?

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Speaker 2
Okay, so when an asteroid or meteoroid is flying through space, it's moving super fast. Think tens of thousands of miles per hour. Now, when it hits Earth's atmosphere, it starts rubbing against the air molecules, which creates a lot of friction. That friction causes the asteroid to heat up, and eventually it gets so hot that it starts to burn up and glow.

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Speaker 2
We call that a meteor. Most asteroids are completely vaporized before they ever reach the ground. But if a big chunk survives the fiery trip through the atmosphere, that's when it becomes a meteorite.

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Speaker 1
So, this meteor.

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Speaker 2
That's why the moon has so many craters. It doesn't have enough. So I can help with that. Do you have any specific questions about the moon, or would you like to explore something new?

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Speaker 1
The meteor crater on the moon that you said was the size of Texas. Can you kind of go through what that impact would have been like on the moon?

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Speaker 2
Absolutely. The South Pole, Aiken Basin, which is that huge crater you mentioned, was caused by a truly massive impact when that asteroid or comet slammed into the moon. It would have been like a cosmic bomb going off. The explosion would have been so powerful that it might have even created a temporary atmosphere around the moon. The impact itself would have melted a lot of the moon's surface, and the debris from the collision would have been blasted hundreds of miles in every direction.

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Speaker 2
It must have looked absolutely insane.

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Speaker 1
What would it have looked like from Earth?

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Speaker 2
That would depend on a few things, like how big the asteroid was and how far away it was when it hit. But if it was a really big one, you might actually be able to see a bright flash from Earth with the naked eye. There's also a chance that some of the debris from the impact could have made it into Earth's atmosphere, creating a meteor shower.

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Speaker 2
That would have been a pretty amazing sight to see.

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Speaker 1
When something like that hits. Does it explode or does it just gouge into the surface?

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Speaker 2
When a big asteroid hits the moon, it doesn't just make a crater on the surface. It actually sent shockwaves deep inside the moon. Think of it like dropping a rock into a pond. You see ripples spreading out across the water, right? Kind of like that. But with the moon, those shockwaves can travel hundreds of miles through the moon's interior.

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Speaker 2
And they might even cause changes in the moon's gravity field for a little while.

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Speaker 1
What did early people think? That the moon was?

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Speaker 2
People have thought all sorts of things about the moon and its connection to life on Earth. Some ancient cultures believed the moon was a powerful goddess who controlled the tides and even human fertility. There are still some theories out there about how the moon cycle might affect things like plant growth and even human behavior. Would you like to hear about some of those theories?

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Speaker 1
Yes, please.

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Speaker 2
Okay, so there's this idea that the moon phases might affect living things on Earth. Some people think it could influence things like plant growth, animal behavior, and even human moods and emotions. There's a whole field of study called immunology that looks into this. There's also a theory that the moon might be connected to our water cycle. Some people think it affects things like rainfall and the movement of water through the environment.

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Speaker 1
Can you go into that further?

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Speaker 2
Absolutely. There's a theory called the lunar effect, which suggests that the moon's gravitational pull might influence things like human behavior. Especially when it comes to things like sleep, mood swings, and even crime rates. Some people believe that the full moon brings out a wilder side in people. There's also the idea that the moon's light might play a role in plant growth.

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Speaker 2
Some studies suggest that plants might grow faster or differently under moonlight compared to complete darkness.

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Speaker 1
Isn't it a thing that, like emergency rooms are more busy in the full moon? I guess I could be just because, like, you can see better at night. So people are bound to be more active.

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Speaker 2
That's a common belief. But whether or not emergency rooms are actually busier during a full moon is a bit tricky. Some studies suggest there might be a slight uptick in visits, but others haven't found a strong connection. It's possible that any connection is more about people noticing the full moon and attributing things that happen around that time to it, rather than there being a real cause and effect.

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Speaker 1
Is the moon always going to revolve around Earth? I mean, short of it getting hit by something?

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Speaker 2
It's a safe bet that the moon's going to stick around for a long, long time while it is slowly drifting away from Earth. It's doing so at a very tiny rate about an inch and a half per year. So it's not going anywhere anytime soon. There's also the possibility that the sun might swallow up both the Earth and the moon in about 5 billion years, when it becomes a red giant.

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Speaker 2
But that's a ways off, so no need to worry about it just yet.

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Speaker 1
You said 5 billion years.

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Speaker 1
Will the moon drift away from Earth before the sun engulfs us?

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Speaker 2
Yeah. The moon is going to stick around a whole lot longer than that. It's moving away from us at about the same rate. Your fingernails grow. So would take tens of billions of years for it to drift far enough away for the sun to make a difference. You could say the sun poses a much more immediate threat to the moon's existence.

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Speaker 1
Is there anything else about the moon you'd like to share?

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Speaker 2
Yeah. Here's one more cool thing about the moon. It's slowly shrinking over time as the moon's interior cools down. It kind of shrivels up, and that causes wrinkles on its surface. These wrinkles show up as faults and scarps, basically like little clips on the moon. It's kind of wild to think that the moon is still changing, even after all these billions of years.

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Speaker 1
If you could live anywhere on the moon, where would you choose?

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Speaker 2
Well, living on the moon would be pretty cool, but I'd want to be near one of the lunar poles. That's because there might be water ice in the craters up there, which would be really useful for drinking and making things like rocket fuel. Plus, the poles get some of the most interesting lighting throughout the lunar day.

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Speaker 1
Explain that.

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Speaker 1
Explain what you just said.

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Speaker 1
Gemini. Can you explain what you just said?

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Speaker 2
Sure thing. So I was saying that if I had to live on the moon, I'd want to be near one of the poles. That's because there's a good chance there's water ice hidden in the craters up there. That would be really useful for drinking and stuff. Like making rocket fuel. Also, the lighting at the poles is kind of unique since the sun is always low on the horizon.

00;27;33;21 - 00;27;39;21
Speaker 2
It would create some really long shadows and interesting lighting effects.

00;27;39;24 - 00;27;50;22
Speaker 1
But that's pretty cool. Okay, any last bits you want to add about the moon?

00;27;50;24 - 00;27;55;18
Speaker 1
Gemini. Any last bits you want to add about the moon?

00;27;55;20 - 00;28;16;13
Speaker 2
One last thing about the moon. It's a great place to study the universe since there's no atmosphere. You get a crystal clear view of space, which is perfect for things like astronomy and studying the earth from a distance. Plus, it would be cheaper to launch rockets from the moon compared to launching them from Earth. So it could be a really important base for future space exploration.

00;28;16;15 - 00;28;22;28
Speaker 1
Okay, I think that's it for today.

00;28;23;00 - 00;28;25;26
Speaker 1
Bye, Gemini.

00;28;25;28 - 00;28;28;03
Speaker 2
See you later.