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from the Library of Congress, a thematic collection exploring changing models of the universe through time, ideas of life on other words and Carl Sagan’s place in the tradition of science. It features manuscripts, rare books, celestial atlases, newspaper articles, sheet music and movie posters.
Open access journal publishing original astronomical research, with an emphasis on significant scientific results derived from observations. Publications in AJ include descriptions of data capture, surveys, analysis techniques, astronomical interpretation, instrumentation, and software and computing.
Open access journal devoted to recent developments, discoveries, and theories in astronomy and astrophysics. Publications in ApJ constitute significant new research that is directly relevant to astrophysical applications, whether based on observational results or on theoretical insights or modeling.