rotation and revolution rotation revolution: the earth orbits around the sun … · 2018-09-05 ·...

Chapter 22.2: Earth-Moon-Sun System The two main motions of Earth are rotation and revolution. Rotation: the Earth spins on its axis Revolution: the Earth orbits around the sun

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Chapter 22.2: Earth-Moon-Sun System

The two main motions of Earth are rotation and revolution.

Rotation: the Earth spins on its axis Revolution: the Earth orbits around the sun

Page 2: rotation and revolution Rotation Revolution: the Earth orbits around the sun … · 2018-09-05 · Chapter 22.2: Earth-Moon-Sun System The two main motions of Earth are rotation and

Precession: slow movement of the axis of a spinning object Axis point of Earth’s tilt continually changes.

Currently pointing towards the star Polaris.

Page 3: rotation and revolution Rotation Revolution: the Earth orbits around the sun … · 2018-09-05 · Chapter 22.2: Earth-Moon-Sun System The two main motions of Earth are rotation and

The Ecliptic is the plane of which the Earth orbits the sun.

Aphelion: the point on the ellipse when Earth is furthest to the sun

Perihelion: the point on the ellipse when Earth is closest to the sun

Page 4: rotation and revolution Rotation Revolution: the Earth orbits around the sun … · 2018-09-05 · Chapter 22.2: Earth-Moon-Sun System The two main motions of Earth are rotation and

Perigee: point on the ellipse when the moon is closest to Earth

Apogee: point on the ellipse when the moon is furthest from Earth.

Page 5: rotation and revolution Rotation Revolution: the Earth orbits around the sun … · 2018-09-05 · Chapter 22.2: Earth-Moon-Sun System The two main motions of Earth are rotation and

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