Learn the solar system, planets, the Milky Way galaxy, how stars are born and die, how black holes form, and how satellites float around Earth — with fun animations.
Click any planet to learn more. The planets are not shown in real size, but the order from the Sun is correct.
A galaxy is a huge family of stars, gas, dust, planets, and dark matter held together by gravity.
A galaxy is like a giant island in space. It can have billions of stars, planets, clouds of gas, dust, and invisible dark matter.
Our galaxy is a barred spiral galaxy. It has a bright center and curved spiral arms. Our Sun is not at the center; it is in one of the arms.
Earth goes around the Sun, the Sun is inside the Milky Way, and the Milky Way is one galaxy among many galaxies in the universe.
From Earth, the Milky Way looks like a cloudy white band in the night sky because we are looking through many stars in our own galaxy.
Only very massive stars can become black holes. This happens after the star uses up its fuel and collapses under gravity.
A very big star forms from a giant cloud of gas and dust called a nebula.
Inside the star, nuclear fusion makes heat and light. This pressure pushes outward.
When the star has no enough fuel, gravity wins and pulls everything inward.
The outer layers explode in a powerful blast called a supernova.
The core collapses into a tiny, super-dense object with gravity so strong that even light cannot escape.
A satellite does not float because there is no gravity. It stays in orbit because it is moving forward while gravity pulls it around Earth.
A satellite is always falling toward Earth, but it is also moving forward very fast. So it keeps missing Earth and goes around it.
Satellites help us with TV, internet, GPS maps, weather reports, phone signals, and Earth observation.
Some satellites carry cameras and sensors. They take pictures and collect data about clouds, oceans, forests, cities, and storms.
Many satellites use solar panels. Solar panels catch sunlight and turn it into electricity.
Answer questions and collect points. Learn by playing.
Badge guide: 🌱 Beginner, 🚀 Explorer, 🛰️ Satellite Expert, 🌌 Galaxy Hero, 🏆 Space Master.
Simple words for young learners.
The path one object follows around another object in space.
The pulling force that keeps planets around the Sun and satellites around Earth.
A huge group of stars, gas, dust, planets, and dark matter.
A giant cloud of gas and dust where new stars can be born.
A huge explosion that can happen when a massive star dies.
A place where gravity is so strong that even light cannot escape.
An object that moves around a planet. It can be natural like the Moon or human-made.
The galaxy where our Sun, Earth, and solar system live.