One of 150 globular clusters that orbit the Milky Way, M107, also known as NGC 6171, a compact and ancient family of stars that lies about 21 000 light-years away, is a bustling metropolis: thousands of stars in globular clusters like this one are concentrated into a space that is only about twenty times the distance between our Sun and its nearest stellar neighbour, Alpha Centauri. A significant number of these stars have already evolved into red giants, one of the last stages of a star’s life.
Read More: http://www.dailygalaxy.com/my_weblog/2011/12/an-ancient-metropolis-orbiting-the-milky-way.html
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