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The above diagrams show the orbital path of the earth as it revolves around the sun.  As you notice in the top diagram, the aphelion (point at which the earth is the farthest away from the sun) occurs in July and the perihelion (point at which the earth is the closest to the sun) occur is January.  The lower diagram shows the how the tilt of the earth appears as the planet orbits the sun.  Remember, we live in the Northern Hemisphere, so we experience our warmer surface temperatures in July and colder temperatures in January.    

I believe we would all agree that when you are closer to a heat source you will experience warmer temperatures.  Then why is our coldest days occurring when we are the closest to the sun?
 


Comments

Awesome Peoples
01/17/2011 8:52am

We think that our coldest days occur when we are closest to the sun because we are tilted away from it. We are tilted away from the sun because of the Earth's axis. This makes the air colder than when we are farther away from the sun but tilted towards it.

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!ns!de Out Bloggers
01/17/2011 8:52am

The reson we have colder days when we are closer to the sun is because we arnt that close to the sun. When we are closer to the sun in January we are tilting farther back wich prevents colder days and when we are in July we are tilting colser to the sun wich provides warmer days.

Reply
Mizzou Tigers
01/17/2011 8:53am

We think that is the way the earth revolves around the sun and the way it tilts on its axis.

Reply
Know-it-Alls
01/17/2011 8:53am

We believe the reason the earth is colder when the sun is closer is because the earth is facing away from the sun. This causes it to feel colder then warmer. When the sun is further away the earth faces it which makes it feel warmer. So it is reasonable to when the sun is closer it gets colder and when the sun is farther away it gets warmer.

Reply
G6 Bombers
01/17/2011 8:54am

Our coldest days are occuring when the sun is closest to the Earth because, our part of the Earth is tilted away from the sun which keeps us from recieving the sunlight. The sunlight we recieve in the summer is when the sun is farthest away and our part of the Earth is tilted towards the sun.

Reply
Skittles
01/17/2011 9:03am

Our hottest days occur when we are farther away from the sun because around the time of the June solstice, the North Pole is tilted toward the sun and the Northern Hemisphere is starting the summer. The density of the solar radiation is higher because it's coming from directly overhead,in other words the sun's rays are concentrated over a smaller surface area.Also the radiation takes a somewhat shorter path through the energy-absorbing atmosphere before hitting the earth.

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Chocolate Thunder
01/17/2011 10:53am

The reason our days are coldest when we are the closest to the sun is because we are tilted away. In January we are tilted away from the sun so we dont have as much direct sunlight which makes it colder. Although the southern hemisphere would get the direct sunlight which makes it much hotter there. In July we are the farthest from the sun but since we are tilted toward it, it makes it much warmer here oppisite from the temperatures of the southern hemisphere once again.

Reply
Vanilla Lightning
01/17/2011 11:01am

The earth is the coldest when closest to the sun and most hot when furthest to the sun. Here is the reason why.
Even though the earth is most cold when it’s closest to the sun that doesn’t make as big of a difference as how it is tilted. The earth’s tilt stays the same all around the sun. So when the earth is around the Perihelion spot Missouri is tilted away from the sun so it is colder in our area. In Australia it is different because they are tilted to the sun there for; it is like summer there for them. In our summer we are tilted towards the sun there for, it is hotter. In Australia it is colder around the Aphelion spot because they are tilted away from the sun. That is why our coldest days occur when we are closest to the sun.

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Science Kids
01/17/2011 11:02am

Okay, for starters, the earth is tilted at 23.5 degrees. Our nation is placed in the Northern Hemisphere, and when it is winter the Earth is tilted away from the sun, the southern hemisphere placed more in the sun rays, therefore, our nation is in the shadows, and the shadows are what make us have colder temperatures. In the summer, our planet is facing towards the sun, with the northern hemisphere placed more directly in the suns rays, and the southern hemisphere is shadowed, with our nation in the direct rays. We get the heat from the sun, in the summer, while the southern hemisphere gets the cold. That is what we believe is the cause of the weird temperature difference.

Reply
Mc.Fatties
01/18/2011 10:16am

Earth travels around the Sun at about 18.4 miles per second while rotating on its axis at about 1,070 miles per hours. Pictured above is Earth during summer for the Northern Hemisphere where the North Pole receives sunlight 24 hours a day. An earth might be tilted closer to the sun in January and tilted away in July making it warmer than January.

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    Picture

    BLOG of the WEEK

    Aug 30-Sept 3
    DgenerationsX said:
    This year or even in the future, when I am down or not doing well on something, I will always think about my seventh grade class motto. It helps me stay focused and to never give up. It reminds if I strive for the best, I won't have to worry about the rest!
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    Positive Bloggers said:
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    After a while, he got in a better mood and was less scared becuase he could now see around himself and a little farther away. He saw his house destroyed so he ran to the closest house that was standing, and was finally okay. 
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    DgenerationX said:
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    Science Smarties said:

    No, not all earthquakes are disasters.
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    DaBoom Bloggers said:
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    Crispy Science Giants said:
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    Big Macs said:
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    Science Kids said:
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    Chocolate Thunder said:
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