The fundamental plane is the plane of the Earth's orbit, called the ecliptic plane.

The axis of the Earth is not perpendicular to the plane of its orbit around the sun.

She angled her head so that the plane of the moon's orbit swung down, and Karen got a good look.

It is tilted almost onto the plane of its orbit.

Well, as you know, the Earth has an inclination of about 23 degrees in relation to the plane of its orbit around the Sun.

The earth's seasons had derived from the tilt of the planet's spin axis compared to the plane of its orbit around the sun.

Instead, Earth's seasons come and go because Earth does not orbit exactly upright with respect to the plane of our world's orbit around the sun.

The plane of the Earth's orbit about the sun is called the ecliptic.

This happens twice a year when the plane of the station's orbit faces the sun.

The plane of their orbit lies almost along the line of sight to the Earth.