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Nicoulas Copernicus formulates heliocentric theory. While some of his math was wrong, this was a huge advancement in what we understood about the solar system.
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Immanuel Kant theorizes that the milky way is a galaxy: a disk with stars, made up of gas. He also theorizes there are more than just our galaxy.
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NASA launches the hubble telescope to further explore the universe outside of our solar system. The Hubble is responible for many astronomical findings.
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astronomers discover habital planets orbiting around the Gliese 667C star. This solar system was found only 22 light years away. They have a much higher mass than earth.