A galaxy is a huge group of stars 🌟, planets, and space dust that all stick together because of gravity. Imagine it like a big, sparkly city in space! Our home, the Earth, is in a galaxy called the Milky Way 🥛.
Galaxies come in different shapes—some look like spinning pinwheels, and others are round like balls!
Mars looks red because it's covered in rusty dust! 🌍✨ Just like how an old bike left outside turns orange, Mars has lots of iron (like in your toys) that got rusty over time.
The wind blows this dust all around, making the whole planet look red! 🚀
Satellites stay in space because they are moving super fast! 🚀 Just like when you swing a ball on a string, it goes around and around. Satellites zoom around the Earth so quickly that they don't fall down. 🌍✨
They are like little space cars driving in circles around our planet!
Gravity is like a magic force that keeps us on the ground! 🌟 When you jump, gravity pulls you back down. It's why things fall when you drop them.
Everything that has mass, like you, me, and the Earth, has gravity. The bigger the thing, the stronger its gravity. That's why we don't float away into space—Earth's gravity is super strong!
Some things float because they are light like a feather 🪶 or a balloon 🎈. Others sink because they are heavy like a rock 🪨 or a toy car 🚗. When you put something in water, the water tries to hold it up. If the thing is too heavy, it sinks! 🌊
Try this: Drop a leaf 🍃 and a coin 💰 in water. The leaf floats, but the coin sinks!
Trains stay on tracks because they have special wheels that hug the rails! 🚂 The wheels are shaped like a big letter "U" and fit perfectly on the metal tracks. This helps the train stay in place and not fall off.
Also, the tracks are very strong and flat, so the train can roll smoothly without wobbling. 🛤️
🌍 Different calendars exist because people from different places and times wanted to keep track of days in their own special way! Some calendars follow the moon 🌙, some follow the sun ☀️, and others follow both!
For example, the calendar we use most (Gregorian) is based on the sun, but some people use a lunar calendar (like the Chinese calendar) that follows the moon!
The Vikings were brave sailors and warriors from long ago! 🚣♂️ They lived in places like Norway, Denmark, and Sweden. They sailed in big wooden boats called longships to explore new lands.
Some Vikings were farmers, and some were fighters. They wore cool helmets (but not with horns—that's a myth! 🎭). They loved telling stories about gods like Thor and Odin.
The Great Wall of China was built by many people a long, long time ago! 👷♂️👷♀️ It was made to protect China from enemies. People used stones, bricks, and even sticky rice to build it! Isn't that cool? 🏰
Emperors (like kings) told workers to build it. Some workers were soldiers, and some were farmers. They worked very hard!
Hurricanes are big, windy storms that happen near warm oceans! 🌊💨 They spin around like a giant top and bring lots of rain and wind.
They happen in warm places because the sun heats the ocean water, and the warm water makes the air move in a big circle. That's how a hurricane starts!