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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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.

The Moon's mean distance from the Earth is constantly increasing. Fortunately, the change rate is very slow—about four centimeters per year.

The tiger's pattern of stripes comes from the very skin. So even if a tiger is shaved, you'd still see the stripes on its skin.

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