BEYOND OUR SOLAR SYSTEM
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Far, Far Away
Our star and its planets are a tiny part of the Milky Way galaxy. The Milky Way is a huge city of stars, so big that even at the speed of light, it would take 100,000 years to cross it. All the stars in the night sky, including our sun, are just some of the residents of this galaxy. Beyond our own galaxy lies a vast expanse of galaxies.

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NASA joined the ancient pursuit of knowledge of our universe comparatively recently; nevertheless, in our first half-century of space science we contributed to several major advances in astronomy. For more information, visit NASA Science Mission Directorate: Astrophysics.

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NASA joined the ancient pursuit of knowledge of our universe comparatively recently; nevertheless, in our first half-century of space science we contributed to several major advances in astronomy. For more information, visit NASA Science Mission Directorate: Astrophysics.

More Questions More Questions