Saturday, July 21, 2007

The Dog Days of Summer

Abby Education - ABBY U.

Everyone knows that the “dog days of summer” occur during the hottest and muggiest part of the season. In ancient times, when the night sky was unobscured by artificial lights and smog, different groups of peoples in different parts of the world drew images in the sky by “connecting the dots” of stars. The images drawn were dependent upon the culture: The Chinese saw different images than the Native Americans, who saw different pictures than the Europeans. These star pictures are now called constellations, and the constellations that are now mapped out in the sky come from our European ancestors.

In the summer, however, Sirius, the “dog star,” rises and sets with the sun. During late July Sirius is in conjunction with the sun, and the ancients believed that its heat added to the heat of the sun, creating a stretch of hot and sultry weather. They named this period of time, from 20 days before the conjunction to 20 days after, “dog days” after the dog star.

The conjunction of Sirius with the sun varies somewhat with latitude. And the “precession of the equinoxes” (a gradual drifting of the constellations over time) means that the constellations today are not in exactly the same place in the sky as they were in ancient Rome. Today, dog days occur during the period between July 3 and August 11. Although it is certainly the warmest period of the summer, the heat is not due to the added radiation from a far-away star, regardless of its brightness. No, the heat of summer is a direct result of the earth's tilt.

I suggest taking a nap!

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More From The Paper On The Floor

Alarmist global warming claims melt under scientific scrutiny
By James M. Taylor - Chicago Sun Times
James M. Taylor is senior fellow for environment policy at the Heartland Institute.

.....Gore claims the snowcap atop Africa's Mt. Kilimanjaro is shrinking and that global warming is to blame. Yet according to the November 23, 2003, issue of Nature magazine, "Although it's tempting to blame the ice loss on global warming, researchers think that deforestation of the mountain's foothills is the more likely culprit. Without the forests' humidity, previously moisture-laden winds blew dry. No longer replenished with water, the ice is evaporating in the strong equatorial sunshine."

.....Gore claims global warming is causing an expansion of African deserts. However, the Sept. 16, 2002, issue of New Scientist reports, "Africa's deserts are in 'spectacular' retreat . . . making farming viable again in what were some of the most arid parts of Africa."

Click here to read the whole article



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Dog Wit & Wisdom
"A dog teaches a boy fidelity, perseverance, and to turn around three times before lying down." -Robert Benchley

Have a tail wagg'en good week!

Woof
Abby