Who concluded that inertia and gravity act together to keep Earth in orbit around the sun?

Which is true?

Copernicus said that the sun was in the center of the solar system.

Which is true about the heliocentric model of the solar system?

At the time people did not believe the Earth was moving.

What does heliocentric mean?

Astronomy is the study of stars, moons, planets and other objects in space.

An ellipse is the shape of Earth’s orbit.

Which is true?

The northern hemisphere tilts AWAY from the sun during our summer.

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