The Dog Days of Summer

July 22nd, 2009 by C.J.

Okay, so you’ve all heard the phrase “dog days of summer” but where did it come from? It is used to describe the hottest and muggiest part of the summer, but why?????

I did a little research and found out that in ancient times, different groups of people all around the world would use the stars to create images in the sky which we all know as constellations.

They saw images of bears, (Ursa Major and Ursa Minor), twins, (Gemini), a bull, (Taurus), and others, including dogs, (Canis Major and Canis Minor).

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The brightest of the stars in Canis Major (the big dog) is Sirius, which also happens to be the brightest star in the night sky. In fact, it is so bright that the ancient Romans thought that the earth received heat from it. Look for it in the southern sky (viewed from northern latitudes) during January.

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.

You learn something new every day.

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One Response to “The Dog Days of Summer”

  1. C.J. C.J. says:

    Now I’m realizing that dog star is also called Sirius and that the symbol for Sirius Satellite Radio is a dog. I’m a genius.

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