Heliocentrism is the theory that the sun is the center of the universe.

The heliocentric theory is the idea that the sun, not the earth, is the center of the universe.

When the sun rises, a new day begins.

I dream of traveling through the universe someday.

He is the center of the team.

He is good at explaining that theory.

Uchuu-kun, have you finished your homework for today yet?

The Solar System is composed of eight planets, including Earth.

We installed solar batteries on the roof of our house.

Solar wind affects the Earth's magnetic field.