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Seasonal Change

Page history last edited by sharon edwards 1 year, 1 month ago

Animation on Wikimedia Commons by Xofc

The Sun & the ecliptic rotation around the Earth : The green Sun is the one of the vernal equinox (march), it is followed by a summer solstice Sun. Then automn equinox and winter solstice. The ground plane (latitude 50°N) is green, the rotating ecliptic plane is blue. Also represented are the celestial equator, the two tropics and the rotation axis.  Animation on Wikimedia Commons by Xofc

 

In the animation

 

The Sun & the ecliptic rotation around the Earth:

 

The green Sun is the one of the vernal equinox (March)

it is followed by a summer solstice Sun.

Then Autumn equinox and winter solstice.

The ground plane (latitude 50°N) is green, the rotating ecliptic plane is blue.

 

Also represented are the celestial equator, the two tropics and the rotation axis.

 

 

Learn More at Teaching Latitude, Longitude and Time Zones

 

 


Summer Solstice

  • The first day of summer
  • Longest day of the year
  • This happens when the North Pole is pointing towards the sun
  • Because the North Pole is pointing towards the sun, the Northern Hemisphere is warmed by direct sunlight
  • During summer, the days are long and hot

 


Winter Solstice

  • The first day of winter
  • Shortest day of the year
  • This happens with the North Pole is pointing away from the sun
  • Because the North Pole is away from the sun, the Northern Hemisphere does not receive direct sunlight
  • During winter, the days are short and cold



Vernal Equinox

  • The first day of spring
  • Equal parts day and night
  • On this day, the North Pole begins leaning towards the sun
      • MidPoint is May Day

 

 

 

Autumnal Equinox

 



For more information, see The Changing Seasons: A Brief Tutorial

 

Fairbanks Goldpanners Midnight Baseball Game

How Alaskans Cope with Two Months of All-Day-Daylight

 

     Learning Activities

 

Click here for a learning plan about the seasons.


Click here for a learning plan about the seasons.

 

 


  Click here for a youtube video on the changing seasons.

 

 

 

 Click here for a song about the seasons.

 

 

Mayan Calendars                                                                                                                                                                    

            

 

This image shows the Haab calendar (right) interwoven with the Tzolk'in calendar (left). In the Calendar Round, any given combination of a Tzolk’in day with a Haab day will not repeat itself, until 52 periods of 365 days have passed. The Maya believe that when a person turns 52, they attain the special wisdom of an elder.

 

Click here for more images of Mayan Calendars, descriptions of how they were created and videos of

present-day Mayan Calendar keepers.         

This image shows the Mayan Haab calendar interwoven with the Mayan Tzolk'in calendar

 

 


 

 

 

 

 

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