Download 4.3 – Earth`s Revolution

4.3 – Earth’s Revolution
• Revolution
• Earth’s movement or
orbit around the sun
• Takes 365 days or 1
year to make one
complete revolution
• Elliptical
• Earth’s orbit is
elliptical (oval shaped)
• Earth is closer to the
sun at certain points of
it’s orbit
• Aphelion
• Perihelion
• Earth is farthest from
sun in its orbit
• Earth is closest to the
sun in its orbit
• Parallax
• Evidence the Earth is
revolving around the sun
• Stars seem to change
position throughout the
course of the year – look
closer or father away
• ACTUALLY!! Earth is
moving – not the star
• Seasons
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Spring
Summer
Fall
Winter
• Summer Solstice
• June 21
• First day of summer
• Winter Solstice
• Dec 21
• First day of Winter
• Vernal Equinox
• Autumnal Equinox
• Mar 21 – 1st day of
Spring
• Sept 21 – first day of
fall