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Scientists are working on new propulsion systems that would allow travel to distant worlds.
Research suggests that a super massive black hole might be the creator of the Milky Way.
Astronomers search for evidence of another Earth. Is there another Earth out there with liquid oceans, rocky continents and life like us? Astronomers seek the answer with spectroscopy, direct imaging and telescopes. They hope to find evidence of atmospheres, magnetospheres and signs of life.