#BeyondSolSys

Today in #BeyondSolSys - the discovery of galaxies.Through the 18th & 19th centuries, better telescopes revealed more nebulae - cloudy objects seen in the sky. Some were eventually seen to
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Today in #BeyondSolSys class material - galaxy history. (Astronomers often speak of galaxy evolution - but as population change rather than descent w/modification, biologists and @GrumpyKelson complain). Anyway, galaxies show
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