Today I Found Out

Why is the Hottest Part of the Summer Called the Dog Days? (2016x250)

Exibido em:: Nov 23, 2016

→Subscribe for new videos every day! https://www.youtube.c→’t exactly known why the ancient Egyptians associated this star with a dog (the star’s hieroglyph is a dog). Sirius would appear in Egypt, after about a 70 day absence, just before the season where the Nile typically floods. So it is thought the star’s hieroglyphic symbol being a dog symbolized a “watchdog”. Want the text version?: http://www.todayifoundout.com/index.php/2010/10/why-the-hottest-part-of-the-summer-is-called-the-dog-days/ Sources: http://www.etymonline.com/index.php?term=dog+days http://en.wikipedia.org/wiki/Dog_Days http://www.thefreedictionary.com/Canicule http://en.wikipedia.org/wiki/Sirius http://en.wikipedia.org/wiki/Canis_Major http://www.amazon.com/gp/product/0517229277?ie=UTF8&tag=vicastingcom-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=0517229277 http://www.amazon.com/gp/product/1435110439?ie=UTF8&tag=vicastingcom-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=1435110439 http://arxiv.org/abs/0801.4031 http://en.wikipedia.org/wiki/Red_giant http://en.wikipedia.org/wiki/White_dwarf http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970518a.html