Hold on to your stars, ladies and gentlemen

Our galaxy is heavier and spinning much faster than scientists thought

By Stephen Ornes, 00:00 AM January 13, 2009

A new study of our galaxy, the Milky Way, says that it is heavier and faster than previously thought. Scientists also uncovered that our galaxy has four arms — two of which contain only newborn stars.

A new study of our galaxy, the Milky Way, says that it is heavier and faster than previously thought. Scientists also uncovered that our galaxy has four arms — two of which contain only newborn stars.

Robert Hurt, IPAC; Mark Reid, CfA, NRAO/AUI/NSF

We live on Earth, which orbits the sun. Our sun is really a star, one of the hundreds of billions in our galaxy, the Milky Way. Our galaxy has a few galactic neighbors, and together we’re called the Local Group. Until recently, scientists thought...

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