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    • Possible Interiors of the TRAPPIST-1 Exoplanets

      NASA· 10 minutes ago

      Overall the TRAPPIST-1 worlds have remarkably similar densities, which suggests they may share the same ratio of common planet-forming elements. The planet densities are slightly lower than ...

    • What is the Universe? - NASA Science

      What is the Universe? - NASA Science

      NASA· 10 minutes 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...