Mon Prof Augmenté
Stars in a Spiral Galaxy
Age 12 · Astronomy
Stars are not spread evenly through space; they gather in huge groups called galaxies. Our galaxy, the Milky Way, holds hundreds of billions of stars, and many of them have planets around them.
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In the picture
- The bright hub at the galaxy’s centre: the densest crowd of stars
- A curved arm of the spiral: a long band where stars and gas are packed together
- A single yellow star: one star among the galaxy’s hundreds of billions
- A small planet on a ring around that star: a world orbiting a star
Examples
- A crowd in a stadium: thousands of people gathered in one place.
- A torch in a dark room with a few small balls rolling around it: the torch is the star and the balls are planets.
Key takeaways
- Stars are gathered into galaxies, not scattered alone through space.
- Our galaxy contains hundreds of billions of stars, and many of those stars have planets.
Quiz: Stars in a Spiral Galaxy (Age 12)
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According to the card, how are stars spread through space?
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About how many stars does our galaxy, the Milky Way, contain?
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What does the card say about planets around stars in our galaxy?
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