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単語数: 320語

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作成日: 2025/07/20 07:01

更新日: 2025/12/08 03:18

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A: Hey there! 🌟 Did you hear about the cool news?
   B: Nope, what's up?

A: Well, some researchers here in Japan made a big find! They say they got tiny rock samples from an asteroid, and it's the oldest ever discovered in our solar system! 🤯
   B: Whoa, really? Where did they get these rocks from?

A: It's from this asteroid named Ryugu. Hayabusa 2, a Japanese space probe, brought 'em back. Each rock is smaller than a millimeter! 🛰️
   B: That's amazing! So, how old are these rocks exactly?

A: They were formed around 4.5673 billion years ago! That's just after the solar system started. And get this, Ryugu itself is younger than that rock! 🌌
   B: Whoa... and where do they think this asteroid came from?

A: They believe it formed somewhere farther away from the sun. And the findings could help us understand how things in our solar system were made and evolved. 🚀
   B: Wow, this is gonna change everything! Thanks for sharing, buddy!

A: No problem, glad to share! Let's see what else they'll discover next! 🌟
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Researchers in Japan are claiming a landmark discovery. They say rock samples retrieved from an asteroid are the oldest ever found in the solar system.
        
                    
                  
Japanese space probe Hayabusa 2 brought the samples back from asteroid Ryugu. They measure less than 0.1 millimeters each.
        
                    
                  
The researchers come from institutions including Hokkaido University. They say the rock was formed in high temperatures 4.5673 billion years ago, shortly after the birth of the solar system.
        
                    
                  
They also say the rock is older than Ryugu, which is made of minerals that formed by reacting with water about 4.562 billion years ago.
        
                    
                  
They add that the asteroid was likely formed somewhere farther from the sun.
        
                    
                  
Associate Professor Kawasaki Noriyuki of Hokkaido University says the findings shed light on how raw materials in the solar system behaved and formed astral objects.

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