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NASA's Cassini spacecraft has picked up particles of dust originating from outside our solar system.
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An ambitious new project is aiming to make interstellar travel a reality within just three decades.
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Astronomers have identified the first signs of life-bearing chemistry at the center of the galaxy.
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NASA's legendary space probe is now believed to have finally exited the solar system after 36 years.
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Researchers have discovered that organic material may be hitching a ride in interstellar dust particles.
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NASA's Voyager 1 spacecraft has become the first ever man-made object to reach interstellar space.