Interesting and Cool Things to Know

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If we weigh the entire Solar System, it turns out that our Sun contains about 99.87% of all the matter. This is equivalent to about 333 000 Earths.

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The Sun will become a Red Giant in about 7.7 billion years. The radius will increase by 256 times, and the outer layers of the star will reach the current orbit of the Earth.

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A man aged 70 has spent about 23 years sleeping: 8 years for dreams and the rest 15 years for sleeping.

The Sun is gradually getting hotter and brighter. In about 1.1 billion years from now, our star will become 11% brighter. Life on Earth under such conditions can only survive in the depths of the oceans at best.

The temperature in the Sun's core is about 15 million degrees Celsius, while on the surface it is only 5500°C. The core is much hotter because it is where nuclear fusion reactions take place.

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