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    • In Depth - NASA Science

      In Depth - NASA Science

      NASA· 20 hours ago

      An exoplanet, or extrasolar planet, is a planet outside of our solar system that usually orbits another star in our galaxy.

    • Stars in an Exoplanet World - NASA Science

      Stars in an Exoplanet World - NASA Science

      NASA· 20 hours ago

      Stars are the most basic building blocks of galaxies. The age, distribution, and composition of stars trace the history, dynamics, and evolution of their...

    • What is the Universe? - NASA Science

      What is the Universe? - NASA Science

      NASA· 20 hours ago

      The universe is everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it...