Earth's Rotation and Revolution

Movement of Earth

Rotation

• Earth's rotation is the movement of the planet on its axis from west to east.
• It takes approximately 24 hours to complete one rotation.
• Rotation causes day and night cycles.
• The speed of rotation at the equator is about 1,674 km/h (1,040 mph).
• The rotation of Earth is responsible for the apparent movement of the sun, stars, and other celestial bodies in the sky.

Revolution

• Earth's revolution is the movement of the planet around the sun in an elliptical orbit.
• It takes approximately 365.25 days to complete one revolution.
• Revolution is responsible for the changing of the seasons.
• The speed of revolution is about 29.78 km/s (18.5 mi/s).
• The Earth's orbit is tilted at an angle of about 23.5 degrees, which affects the distribution of sunlight and heat around the planet.

Earth's Axis

• The axis of Earth is an imaginary line that runs through the North and South Poles.
• The axis is tilted at an angle of about 23.5 degrees relative to the plane of the Earth's orbit.
• The tilt of the axis is responsible for the changing of the seasons.
• The axis remains relatively fixed in space, pointing towards the North Star (Polaris) in the Northern Hemisphere.
• The axis is not fixed in place, but rather wobbles slightly over a period of 26,000 years due to the gravitational pull of other celestial bodies.

Movement of Earth

Rotation

• Earth rotates from west to east, taking approximately 24 hours to complete one rotation.
• This rotation causes day and night cycles, with the speed at the equator being about 1,674 km/h (1,040 mph).
• The rotation of Earth is responsible for the apparent movement of the sun, stars, and other celestial bodies in the sky.

Revolution

• Earth revolves around the sun in an elliptical orbit, taking approximately 365.25 days to complete one revolution.
• This revolution is responsible for the changing of the seasons, with a speed of about 29.78 km/s (18.5 mi/s).
• The Earth's orbit is tilted at an angle of about 23.5 degrees, affecting the distribution of sunlight and heat around the planet.

Earth's Axis

• The axis of Earth is an imaginary line running through the North and South Poles, tilted at an angle of about 23.5 degrees relative to the Earth's orbit.
• The tilt of the axis is responsible for the changing of the seasons, and it remains relatively fixed in space, pointing towards the North Star (Polaris) in the Northern Hemisphere.
• The axis wobbles slightly over a period of 26,000 years due to the gravitational pull of other celestial bodies.