The Earth spins on its ______, which makes day and night.
axis
The Moon moves in a circular ______ around the Earth.
orbit
The Sun is at the center of our ______.
solar system
We can see patterns of stars called ______ in the night sky.
constellation
A ______ is an object that orbits a planet, like the Moon.
satellite
People who study planets, stars, and galaxies learn ______.
astronomy
The Earth makes one complete ______ every 24 hours.
spin
The planets in our solar system move around the Sun in a ______ model.
heliocentric
Each star in a ______ can help us find our way at night.
constellation
A ______ eclipse happens when the Moon moves in front of the Sun.
lunar
