The Sun, Moon, and Stars
Kindergarten · Science · Study Guide
Take a trip into space without leaving Earth — explore the sun, the moon, and the stars!
When you look up at the sky, you can see amazing things! During the day, the bright sun lights up the sky and warms the Earth. The sun is actually a star — a giant ball of hot glowing gas. It is so large that about one million Earths could fit inside it! The sun is our closest star, which is why it looks so big and bright compared to the tiny stars we see at night.
The moon is Earth's closest neighbor in space. It is a large ball of rock that travels around the Earth. The moon does not make its own light — it reflects sunlight, which is why it glows at night. The shape of the moon seems to change over the month — these changing shapes are called phases. You might see a full round moon, a half moon, or just a thin crescent.
Stars are suns very, very far away from us — so far that they look like tiny dots of light in the night sky. Some stars form patterns called constellations that look like animals, people, or objects. Astronomers are scientists who study space, including the sun, moon, stars, and planets.
| Object | What It Is | Makes Own Light? |
|---|---|---|
| Sun | The nearest star to Earth | Yes |
| Moon | A rocky ball orbiting Earth | No — reflects sunlight |
| Stars | Distant suns far from Earth | Yes |
Key terms
- Star
- A giant ball of hot glowing gas that produces its own light — the sun is our nearest star.
- Moon
- Earth's natural satellite — a large rocky ball that orbits Earth and reflects sunlight.
- Orbit
- The path an object takes as it travels around another object in space.
- Phase
- One of the changing shapes the moon appears to have during the month.
- Constellation
- A group of stars that form a pattern or picture in the night sky.
Flashcards
- Sun
- Earth's nearest star — a giant ball of hot gas that provides light and warmth.
- Moon
- Earth's natural satellite — a rocky ball that orbits Earth and reflects sunlight.
- Star
- A giant ball of hot glowing gas far away in space.
- Phase
- The changing shapes of the moon we see during a month.
- Constellation
- A pattern of stars in the night sky.
- Orbit
- The path an object takes as it travels around another object in space.
Practice questions
What is the sun?
- A planet
- A giant star closest to Earth
- A moon
- A comet
Show answer
Answer: A giant star closest to Earth
The sun is a star — like all the other stars we see at night — but it appears much larger and brighter because it is vastly closer to Earth than other stars.
The moon makes its own light.
Show answer
Answer: False
The moon does not produce its own light. It appears to glow because it reflects light from the sun back toward Earth.
What are the changing shapes of the moon called?
- Orbits
- Constellations
- Phases
- Eclipses
Show answer
Answer: Phases
As the moon orbits Earth, different amounts of its sunlit side face Earth — we see these as the phases: new, crescent, half, gibbous, and full moon.
Stars are giant balls of hot glowing gas.
Show answer
Answer: True
Stars are enormous spheres of plasma (hot gas) that generate their own light and heat through nuclear reactions deep in their cores.
A group of stars that form a pattern in the sky is called a ___.
Show answer
Answer: constellation
Constellations are named patterns of stars — ancient peoples named them after animals and mythological figures to help navigate and track seasons.
Fun facts
- It takes about 8 minutes for light from the sun to reach Earth, even though light travels incredibly fast!
- The moon takes about 27 days to travel all the way around the Earth — that is almost one month!
- There are more stars in the universe than grains of sand on all of Earth's beaches combined!
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