Our galaxy is home to many, many more Earths than we ever thought

So much for being special. Our spiral galaxy, the Milky Way is very, very big. Measuring 100,000 light-years in diameter (or one quintillion kilometres), our Solar System (including Earth) is located approximately halfway across its radius. To give you a sense of its magnitude, it would take about 25,000 years at the speed of light […] via WordPress http://ift.tt/1CYIe51