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News for Norther Colorado and the world

Tuesday, March 31, 2015

Posts Tagged ‘January 17’

Sky Tonight—January 17, Sun moves toward star Vega

Sky Tonight—January 17, Sun moves toward star Vega in journey around galaxy

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org An Australia visitor wrote, I seek to find out what speed our sun is traveling at and also how many years does it take to circumnavigate the galaxy? Our Milky Way galaxy is a collection of several hundred billion stars. It has an estimated diameter of 100,000 light-years. Our sun does indeed circumnavigate the Milky Way galaxy. In space, everything moves. There are various estimates for the speed the sun ... Full Story

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