← Astronomy🔭 The Solar SystemGrade 3 · Elementary
📖 Read this first — then you'll teach it
🖍️ Highlighted = the heart of it. Build your lesson from these — they're worth 60% on their own. Say them in your words to go past 80!

Our solar system is like a giant family in space, and the Sun is the parent right in the middle. The Sun is a star, which means it is a huge ball of hot, glowing gas. Everything else in the family circles around it.

Eight planets travel around the Sun in big loops called orbits. Some planets are close and warm, and some are far away and freezing cold. Earth, the planet we live on, is the third one out from the Sun.

The Sun's gravity is like an invisible rope that holds everything in place. Gravity is a pull that keeps each planet on its path so it does not fly off into deep space. Without the Sun's gravity, the planets would wander away.

The solar system has more than just planets. There are moons that circle the planets, chunks of rock called asteroids, and icy comets with long glowing tails. Even tiny bits of dust are part of the family.

Everything in the solar system moves. Planets spin like tops while they travel around the Sun. One full trip around the Sun is what we call a year, and Earth takes about 365 days to finish its trip.

Scientists study the solar system to learn where we live in space. Knowing how planets move helps them send spacecraft to visit other worlds and take amazing pictures for us to see.

🤖 Now your AI tutor asks — write your answer or your thinking:
No wrong answers here — jot what you think. You'll use these when you teach it in Step ②. (Saved automatically.)
☀️What do you think would happen to the planets if the Sun suddenly disappeared?
🪐Where is Earth in the line of planets, and why might that spot matter for us?
🔁Why do you think planets travel in curved orbits instead of straight lines?
⭐How would you explain the difference between a star and a planet to a friend?
🚀Who studies the solar system, and how do they learn about faraway planets?
🌌Besides the planets, what part of the solar system would you most want to explore?
✅ Quick check — did it stick?
Get these right and the Teaching Hall opens. Wrong pick? You'll see why — then try again.
What sits in the middle of our solar system?
What do we call the path a planet takes around the Sun?
What force keeps the planets from flying away into space?
3 more quick checks to go — get them right and you're in. 💪