Red dwarf stars are small stars. Some of them are a hundred times smaller than the sun. Because of their small size, these stars burn their fuel very slowly. So, they can live a very long time. Surprisingly, some red dwarf stars can live trillions of year
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The Solar System is made up of all the planets that orbit the Sun. The Solar System also consists of moons, comets, asteroids, dust and gas. Everything in the Solar System orbits around the Sun.
We are living on Earth. But how much do you know about it? This week, let's learn more about our planet. The Earth is the third planet in order from the Sun. It is about 150 million kilometers from the
What's your blood type? A, B, O, or AB? Do you know what the world's most common type of blood is? Did you say "B" Wrong! The answer is O! The O blood type is very common around the world. About 63% of people all around the globe share the blood type!
The Sun is the largest object in the solar system. So, how big is it? The sun is nearly 333,000 times more massive than the Earth. It also makes up 99.86 percent of the solar system's mass. If the Sun were hollow, over 1.3 million Earths could fit inside
We have many bones inside our bodies. The human skeleton consists of 206 bones. In fact, we are born with more bones (about 300). But as a child grows up, bones join together to make longer bones.
Saturn is a very interesting planet. It got its name from the Roman God of Agriculture, Saturn. It is the sixth planet from the Sun, between Jupiter and Uranus. Saturn is the second biggest planet in the solar system. (Jupiter is the biggest.) Its diamete
You have about 4~6 liters of blood in your body. Your blood is very important for your health. Without enough healthy blood, your body will not get the oxygen and energy it needs. Also, healthy blood protects you from germs.
It's very hot in the summer. But it's very cold in the winter. So, why does the temperature change? This is because the Earth's axis is tilted. Many people believe that the temperature changes because the Earth is closer to the sun in summer and farthe
A black hole is the last phase in a massive star's life cycle. But to better understand this concept, you need to know about the life of a star. Stars are large hot bodies of hydrogen gas that burn brightly for millions or even billions of years through nuclear fusion. But not all stars are the same size. The size of a star is determined by its mass, which is the amount of gas that the star is made of.
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