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One star among many
Age 9 · Astronomy
The Sun is a star, and it is only one of a huge number of stars. Those stars are gathered into a galaxy, and the universe holds a great many galaxies.
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Every lesson is open to everyone for 7 days after it is published. This one came out on September 18, 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
- A small yellow star with a thin ring around it: our Sun
- The dense, bright middle of the spiral: the heart of our galaxy
- A faint oval cloud far beyond the galaxy’s edge: another galaxy
Examples
- One grain of sand on a whole beach.
- One tree in a forest that stretches over many hills.
Key takeaways
- The Sun is a star, not the only one.
- Stars group into galaxies, and galaxies fill the universe.
Quiz: One star among many (Age 9)
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What is the Sun?
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According to the card, what are stars gathered into?
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What does the universe hold a great many of?
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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