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Earth farthest from sun for 2012 on July 4

7/4/2012

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Picture


Planet Earth reaches its most distant point from the sun for 2012 on July 4,  at 10 p.m. Central Daylight Time in the U.S. (July 5 at 3 UTC). By
Universal Time, that’s  July 5, at 3 in the morning.


Astronomers call this farthest point aphelion, and, at aphelion  we’re about three million miles farther from the sun than we will be six months  from now.  That’s in contrast to our average distance from the sun of about 93  million miles.  Looking for Earth’s exact distance from the sun today?  It’s at  94,505,851 miles. Last year, on July 4, 2011, the Earth at aphelion was a tiny  bit farther, at 94,511,923 miles.


Planet Earth reaches its most distant point from our local star for all of 2012 on July 4, at 10 p.m. Central Daylight Time in the U.S. (July 5 at 3 UTC). Image Credit: NASA
We’re always farthest from the sun in July during a Northern Hemisphere  summer – and closest in January during a Northern Hemisphere winter – and that’s  a good illustration of the fact that it’s not the Earth’s distance from the sun  that creates the seasons on our world. Instead, the seasons result from Earth’s  tilt on its axis. Right now, it’s summer in the Northern Hemisphere because the  northern part of Earth is tilted most toward the sun.


Meanwhile, it’s winter in the Southern Hemisphere because the southern part  of Earth is tilted most away from the sun.

 
Why isn’t the hottest weather on the  year’s longest day?

So Earth’s varying distance from the sun doesn’t create the seasons. But it  does affect the length of the seasons. That’s because, at our farthest from the  sun, like now, Earth is traveling most slowly in its orbit. That makes summer  the longest season in the Northern Hemisphere and winter the longest season on  the southern half of the globe.


Conversely, winter is the shortest season in the Northern Hemisphere and  summer is the shortest in the Southern Hemisphere – in each instance, by nearly  5 days.

Link to ARTICLE: http://earthsky.org/tonight/earth-farthest-from-sun-for-year-in-early-july

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