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Scienec – Solstices, Equinox, Aphelion, Perihelion

Posted on: July 20, 2016

Still confused about Solstices, Equinox, Aphelion, Perihelion?

Hope this picture helps:

SolarOrbit

equinox

solstice

aphelion perihelion

Look at the picture, as you can see,
1.  the Sun is not in the middle of the Earth’s orbit.
2. the seasons 四季 on Earth is not caused by the distance from Sun, it’s caused by the “TILT” 倾斜 of Earth’s axis.
3. When the Earth is at “aphelion” (furthest to the Sun) it’s Summer in Northern hemisphere 北半球
4. When the Earth is at “perihelion” (closest to the Sun) it’s Winter in Northern hemisphere

 

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