Mon Prof Augmenté
Our Star and Its Planets
Age 9 · Astronomy
A single star sits in the middle, and planets travel around it on circular paths. The planets farthest from the star are much farther away than the ones close to it.
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Every lesson is open to everyone for 7 days after it is published. This one came out on October 6, 2026: its text stays readable here, and its picture opens with a subscription.
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Age 9: open this week
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In the picture
- The yellow star at the centre: one star
- The close planet on its circular path: a planet orbiting near the star
- The far planet on its wide circular path: an outer planet much farther from the star
Examples
- A runner on an inner lane and a runner on an outer lane around a track: the outer lane is much farther from the centre.
- A toy train on a small circular track around a tree and another train on a much wider track: the wider track is farther out.
Key takeaways
- One star can have many planets moving around it.
- The outer planets are much farther from the star than the inner planets.
Quiz: Our Star and Its Planets (Age 9)
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What is at the centre of this solar system?
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What do the planets in this solar system do?
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How far are the outer planets from the star compared with the inner planets?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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