Milky way galaxy (sometimes simply called the galaxy), large spiral system of about several hundred billion stars, one of which is the sun.. Discover what a galaxy is explained in simple terms, how many galaxies exist, and how the universe size shapes our view of the cosmos—packed with clear, engaging science.
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Our galaxy, the milky way, sits in a local group of more than 20 galaxies, but hubble’s vision takes us far beyond our celestial neighborhood.. Find the next big thing from smartphones & tablets to laptops & tvs & more.