Look up at the night sky. Stars are giant balls of gas.
The sun is a star. It is the closest star to Earth.
Some stars are bigger than the sun. Some are smaller.
Stars come in red, orange, yellow, white and blue.
The brightest star in the night sky is Sirius.
Stars twinkle. We see their light through Earth's air.
Planets twinkle less than stars. They glow with a steady light.
Stars live in huge groups called galaxies.
The sun is in a galaxy called the Milky Way.
Words to know
- galaxy: star group
- Sirius: brightest star
- planets: worlds
- twinkle: blink with light
