From how it all began to how scientists think it will likely come to an end, explore the secrets of the universe with Britannica. Find out about stars, nebulae, constellations, planets, and more. Learn more about game changers like Henrietta Swan Leavitt, who helped prove that there were galaxies beyond our Milky Way. And hear from Britannica Experts about their work in astronomy and favorite things about the field.
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