All of the objects in space that move around the Sun are called parts of the solar system. The eight planets and their moons fall under this group, in addition to dwarf planets, asteroids, comets, and other small, icy bodies. Even so, the solar system is mostly made up of empty space. The solar system is a very small part of the Milky Way galaxy, which is made up of many stars and other celestial objects. Every 225 million years, the solar system revolves around the galaxy's core. There are billions of galaxies in the universe, and the Milky Way is just one of them. Let's talk about the solar system in a way that kids can understand.
Stars and planets move around the Sun in an area called the Solar System. This is caused by a force called gravity. There are planets, stars, asteroids, comets, and the Earth in this space. Together, they make up the Solar System.
You are probably aware that the Sun is a star. It's still just a star, even though it's right next to us and easy to spot. Astronomers have seen stars of different sizes, textures, ages, and metal makeup. This is possible because there are so many stars in the Universe. The stars in this group have a surface temperature of 5,300 to 6,000 K, and they emit light by mixing hydrogen and helium. On average, they live for 10 billion years. It's not all bad news, though, because G V Stars can go through many steps. Some are just starting to grow, while others are in their middle years or nearing the end of their lives. Sirius is the biggest star besides the sun.
There are about 100 billion stars in our sky, and the sun is one of them. The sun has a big effect on Earth. It sets the seasons, controls the weather and water currents, and makes photosynthesis possible for plants. Without the sun's heat and light, there would be no life on Earth. This is the sun's most important role.
The Eight Planets and Their Unique Features
1. The Closest Planet: Mercury is the planet that is closest to the sun. There is only one world, and it is made of rock. It is much hotter than Earth and goes around the Sun in 88 days because it is so close.
2. The hottest planet is Venus. Venus is the second planet from the sun, after Mercury. It is also made of stone. There is air around Venus, just like there is around Earth, but Venus's atmosphere is much thicker and is always cloudy.
3. Earth, Our Home: This is where we live! Earth is the only world with liquid water and is made up of rocks. All of the other worlds are either too hot or too cold. The Earth goes around the Sun once every year.
4. Mars, the Red Planet: Mars is not as big as Earth, but it's a long way away. It used to have an atmosphere like Earth and Venus, but now it doesn't have much of one. Mars has a reddish color, so it is sometimes called "The Red Planet."
5. Jupiter, the Biggest: Jupiter is the largest planet in the solar system. Jupiter is big enough to hold 1,321 Earths. The four "gas giants" are made up of it. Out of Jupiter's 66 moons, one is bigger than Mercury.
6. Saturn Has Rings: Saturn's rings are well known. Galileo saw the rings for the first time in 1610 using a telescope. They are made up of a lot of small ice and dust particles, mostly ice.
7. Uranus, the Coldest: Uranus is another "gas giant." Uranus is so big that it can fit 63 Earth-sized planets into it. The normal temperature on Uranus is -220°C, and it orbits the Sun every 84 years.
8. The Farthest Away: Neptune is the planet that is the farthest from the sun. It takes 165 years to go around the Sun, which is 30 times farther away than Earth. The fourth "gas giant" is Neptune, which is 58 times the size of Earth.
What Are Constellations and Why Do They Matter?
When seen from Earth, a constellation is a pattern made by a group of stars that can be seen. The shape they make can be that of an animal, a mythical being, a person, a woman, or something artificial, like a microscope, a compass, or a crown.
Things You Didn't Know About the Sun
Things You Should Know About the Sun: As a star, the Sun emits light and heat, and it is made up of hot gas. There are, however, some objects in the Solar System that don't move around the Sun. One example is how the Moon goes around the Earth. Eight planets go around the Sun. This is the order of the planets in the Solar System: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. This planet is called Jupiter, and it is the biggest. The Earth spins as it goes around the Sun. One day is the same as one full turn. 365 cycles, or days, make up a year. The Sun is one of the many billions of stars that together make up our galaxy, which is commonly known as the Milky Way. The sun, which is a medium-sized star, is big enough for a million Earths. Earth was thought to be the only world in our solar system with water for a long time. NASA just found the strongest proof yet that there is sometimes moving water on Mars!
What Are Comets Made Of?
Comets are made up of sand, ice, and carbon dioxide that were around when our solar system was first formed, about 4.5 billion years ago. Though Jupiter, Saturn, Uranus, and Neptune all have smooth surfaces, you would not be able to walk on them.
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