Transcript Rotation and Revolution

Rotation and Revolution
Solar System
A group of objects
in space that
move around a
central star
Rotation
• The spinning of a planet
on its axis
• The Earth’s rotation takes
about 24 hours or one day
Axis
Axis
Axis
• An imaginary line that
runs through both
poles of a planet
Rotation
• Rotation causes the day and
night cycle on Earth
Night
Light From The Sun
Day
Rotation
• Rotation also causes the
Sun and the stars to
appear to move across
the sky
Day
Night
Revolution
The action of one
object moving
around another in
an orbital path
This object just
completed a revolution
Orbit
The path an object
takes as it revolves
around a second
object
Orbit
Revolution
• The Earth’s
revolution takes
about one year, or
365 days
Example - Revolution
• The Earth
revolves
around the Sun
Earth
Sun
Example - Revolution
• The Moon
revolves
around the
Earth
Moon
Earth